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Apple swapped the SD card slot on MacBook Pro with four USB-C ports in 2023. It took flak from users who didn’t like the idea of using a bunch of dongle/adapters with their new MacBook Pro. Years later, Apple has reintroduced SD cards and MagSafe charging on 14-inch and 16-inch MacBook Pro.

Unfortunately, there is a deluge of complaints regarding the SD card on the 2023 MacBook Pro. Many users are experiencing slow transfer speeds. Some users are unable to access memory cards on their MacBook Pro. The erratic nature of the problem has confused users. But we have some fixes. Read on!

How to fix SD card reader not working on Mac

Apple has informed users that it is looking into the problem. Till then, we have curated the most effective ways to fix SD cards on MacBook Pro.

1. Upgrade to the latest macOS version

For some users, upgrading to the latest version of macOS did the trick. After upgrading, they could use SD cards without problem on their Mac. If this works, it could be a software bug and not a hardware issue.

The issue was reportedly solved in macOS Monterey 12.1 Beta 4 for some. Hopefully, the update will appear on macOS stable build.

2. Enable external discs in Finder Preferences

Some users report that they are unable to see SD cards in Finder. One of the possibilities is that the external card is hidden in the Finder sidebar. macOS offers many ways to customize Finder toolbars. Follow the steps below to enable the Finder sidebar.

For the sake of convenience, you can create an SD card shortcut on the desktop. Here is how:

Now, you can access the external disc via a desktop shortcut.

3. Unlock SD card

All SD cards come equipped with a slider lock. If the slider is down, the card is locked. When locked, you will no longer get to access the SD card. Hence, before inserting it into the card slot, ensure it is unlocked.

Furthermore, check whether the disk is encrypted. If so, you will need the encryption key/password to access the content.

4. Backup data and format SD card on Mac

Sometimes you can access the contents of the SD card but are unable to transfer data. In such a scenario, create a backup. Once the backup is successful, go ahead and format the SD card. Users have noted that SD card formatted on other devices like DSLR camera or GoPro is not accessible on MacBook Pro.

You can solve this issue by formatting the SD card. You can check our detailed guide to understand the process. Make sure you choose the appropriate Filesystem format. For SD cards larger than 64GB, format with ExFAT, and for smaller cards, you can choose FAT32.

Once done, insert the card and check it is working on your Mac.

Note: The exFAT format works only on newer macOS (Snow Leopard and above).

5. Access SD card in Recovery mode on Mac

Recovery Mode on Mac is an effective way to diagnose software issues. macOS fires up a diagnostic check of your Mac’s startup disk, deleting cache files if necessary. Here is how you can use Recovery Mode on Mac with an Intel chip. If you use an M1-powered Mac, check out this guide.

Next, exit Safe Mode and check if the SD card is working properly.

6. Try changing the SD card adapter

These days most of us use microSD cards. Mac users commonly use an SD card adapter. Some reports claim that SD card adapters affect performance. It is a grey area. However, I suggest you try out a different adapter and see if it makes any difference.

This should help get your SD card up and running. However, if it’s running slow, read on to learn what you need to do.

How to fix slow SD card reader on 14-inch and 16-inch MacBook Pro

Some 2023 MacBook Pro users complained, saying that they could open and access the SD card but experienced slow transfer speeds. Before proceeding, note that Apple has already confirmed the UHS-II (speeds up to 300MB/s) standard for the SD card slot on MacBook Pro.

One of the most common error messages is “The Finder can’t complete the operation because some data in “filename” can’t be read or written.” The below troubleshooting steps should help you fix this error.

1. Check for speeds using an external SD card reader

Arrange for an external card reader and check for transfer speeds. The majority of MacBook users experienced better speeds with an external card reader. If it is the same case with you, the problem is with macOS or the MacBook Pro hardware.

Once diagnosed, you can reach out to Apple Support and ask for an explanation.

2. Clean adapter and card

It is likely for debris to accumulate on SD card contact points and even inside the adapter. Sometimes debris like lint affects performance and could also prevent SD cards from working.

I suggest using a small brush to clean the dust and other particles. If you use an adapter, blow some air to push the dust out.

3. Change SD card to increase data speeds

SD cards are speed-rated by the manufacturer. Each speed class will tell you about transfer speeds. Choosing a memory card of the right speed class is essential. The SD association mentions Class 2, Class 4, 6, and 10, with Class 10 being the fastest. Ideally, transfer speeds on your SD card should correspond to its Speed Class.

Consider upgrading the SD card to one with a higher speed class if necessary.

As a last resort, you can contact Apple Support. They will run a series of diagnostics and find the root cause. If in warranty, Apple will repair your MacBook for free. The company might swap your MacBook Pro with a new device in certain cases.

Other related articles you’ll enjoy reading:

Author Profile


Mahit is an engineer by Education with a corporate stint to his name. He ditched the corporate boardroom wars in favor of the technology battleground. For the better part of a decade, he has worked for popular publishing outlets, including Dennis Publishing, BGR India, AppStorm, MakeUseOf, and iPhonehacks.

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Fix: Steam Gift Card Not Working

Steam gift cards are one of the most in-demand gift cards to purchase games and other in-game items. But what if your Steam gift card is not working?

Many factors are responsible when a Steam gift card does not work. Let us now see what to do if the Steam gift cards are not working.

You get a digital card when the receiver approves the gift. The digital Steam wallet of the recipient will be credited with the equivalent amount value written on the Steam card. After this, they can buy games, in-game items, etc using the credited amount on the Steam Wallet.

Now let us see what to do when your Steam Gift Card is not working.

Check the steps described below and follow the instructions given when the Steam gift card not working.

Also check: How To Refund DLC On Steam?

When your Steam code is not working, wait for some time before moving on to other solutions.

Though Steam updates the account balance immediately after you redeem a code, it may take some time to show up.

So, log out of your steam account and then log in back and check. If you encounter the same issue after an hour, then try to redeem the Steam code again. If this step does not work, then go to the next solution.

Steam wallet code won’t redeem if it is incorrect. So, check the validity of your Steam code. It is recommended to double-check the characters. Sometimes the letters get replaced with identical numbers and vice-versa which creates problems.

Here is a list of probable pairings that you should check:

Alphabet O for number 0

Alphabet G for number 6

Alphabet B for number 8

Alphabet I & L for number 1

Alphabet S for number 5

So, make sure that you maintain accuracy while using a Steam gift card code. It is better to copy and paste the code instead of typing it.

Steam gift cards won’t work if the currency is invalid for that particular region.

So, make sure that you have got the key for the proper region. You may receive an error message saying that the gift card cannot be redeemed to your account as the currency code is different than your region.

Check the region tag from the title of the product. It will disclose for which region it is meant. You are not allowed to activate it elsewhere.

It is also very important to check that you are redeeming your Steam gift card for a proper product.

Like the retail copies of games like Sims 4, will get activated to Origin and not to Steam. So, make sure that you use your Steam gift card for what it is meant for.

For example, if you have an iTunes gift card, you can only redeem them in the iTunes Store only and so on.

If nothing helps and the Steam code is not working, then contact the Steam Customer care unit. Make sure to send the image of the error and mention the details. Wait till the customer support unit reverts you and solves the problem.

Now here I am mentioning the process to redeem a Steam gift card properly. Check the following steps:

Follow the on-screen prompts properly to finish the process.

This will redeem your Steam wallet code successfully. Enjoy your favorite games now!

So that is what to do when the Steam gift card is not working.

How To Clone An Sd Card On A Pc

SD card is a highly portable storage device people use in mobile phones, cameras, gaming consoles, and so on. And cloning is a great idea to create backups or upgrade to an SD card with a larger capacity.

If you want to clone an SD card on a Windows device, you can only use third-party apps. Or, you can use a Linux or a Mac PC, which has a built-in method to clone SD cards. You can also use SD card duplicator devices.

In this article, you can find the detailed process of all these methods.

There are a few scenarios where you should clone an SD card, such as:

For Backup and Recovery purposes.

Transferring files quickly.

Creating another bootable drive.

Upgrading to a larger SD card while keeping all the contents.

You should make the following preparations before cloning the SD card so that the process goes smoothly:

Cloning erases all data on the target drive. So, make sure to backup all necessary data.

The destination drive needs to have enough storage space to save the data from the source. If you want to clone all sectors, the target drive needs at least the same size as the source.

You need an SD card reader to clone a microSD or if you don’t have a built-in card adapter. (If you are confused between an SD card and a Micro SD, we have just the right article to help you clear your confusion.)

Cloning may take a long time, and you don’t want to abruptly cut off the process. So, use a power backup, such as UPS, and connect your Laptops to the AC power supply to prevent abrupt shutdowns.

Some OS like Windows does not have a built-in method to clone any drives, including SD cards. So you need to use third-party cloning software. One easy-to-use open-source application you can use for this purpose is the Win32DiskImager. It is a lightweight free software to copy a complete image of a disk and restore a disk using the image.

Win32DiskImager clones every sector of the SD card to the image file. So, the file size will be the same as the maximum space on the SD card. Therefore, you can only use Win32DiskImager to clone an SD card to an equal-sized or larger storage device.

Here are the necessary steps to use this application to clone an SD card:

You can also use other free apps like Clonezilla to perform the same task. If you want to use them, it’s better visit their official websites or documentation to find out the complete process to clone your SD card.

Most open-source apps only allow cloning whole sectors of the SD card. But it is also possible to clone used sectors only. You can also manually adjust partition size in such cases and consequently, you can clone to a smaller SD card or even a hard drive.

You’ll have to use paid apps for such purposes like AOMEI Partition Assistant, Macrium Reflect v8, and so on. Some free ones may also allow cloning used files only, so browse the internet if you want to search for them.

These programs are easy to use and the general process is as follows:

Insert both SD cards, or an SD card and any other drive.

Open the app and search for Disk Clone option.

Select whether you want to clone used data only or all the sectors.

Choose the source and destination drive.

Adjust Partition size.

Initiate the cloning process.

Unlike Windows, Mac and Linux systems have native options to clone an SD card. You can use the Terminal for this purpose on both Operating Systems. 

Here is the complete process:

SD card Duplicators are hardware devices with embedded programs for cloning SD cards. While they are somewhat costly devices, you only need to insert the SD cards and press a button to clone from one to another. And you can simultaneously clone to more than one device.

But some cheap models are known to have issues while duplicating. So, don’t forget to read the user reviews before buying a Duplicator.

Users usually use Virtual Hard Disks to create another drive for a Virtual Machine or transfer files to the VM. However, you can also clone a drive, such as SD card drive, by copying a physical drive to the VHD and VHD to another drive. You can use the Microsoft Sysinternals program Disk2Vhd to create the virtual disk. To do so,

After creating the VHD, you need to use other VHD to Disk conversion apps to copy its contents to the disk.

Yes, you can clone an SD card to a Hard Drive, an SSD, or a Flash drive, provided that you satisfy all other requirements. Most applications do not allow cloning SD cards to a device with GPT partition mode. So, check the partition information of your hard drive and whether the app you are using supports it or not before trying to clone the SD card. 

So, if you only clone the used sectors, it’s faster than copying. But cloning all sectors is slower if you have more free space.

Yes, cloning a bootable SD card is a surefire way to create other bootable drives. A bootable drive contains many data that are completely hidden from the user. Even showing all protected files does not make the data visible.

So it’s impossible to simply copy all files from a bootable SD card to make another bootable drive. But cloning copies all the sector data, so it transfers even those hidden data.

How To Mount An Sd Card On Your Android Device

After the blip when smartphone manufacturers thought creating devices without expandable storage was a good idea, we are now seeing manufacturers adding an SD card slot to the phones again. If you’re ready to expand your storage, it’s as simple as learning to mount an SD card on your Android device.

Here we show you how to mount your SD card, unmount it, and what this whole mounting malarkey means in the first place.

Why Mount Your SD Card?

Whatever device you put an SD card into, you’ll need to mount it, which means the SD card becomes readable by whatever device it’s in. Think of it a bit like a mini-installation, which makes the SD card visible to the device and makes it play nice with processes and software on your specific phone. When you unmount it, the SD card disconnects from your device.

If you don’t mount an SD card on your Android device, it won’t be readable by your device. If you don’t unmount your SD card before removing it, you risk losing data on the card, as you didn’t give it the chance to disconnect at the software level before pulling out the hardware (sort of like switching off your PC at the mains instead of going through the Shutdown process).

How to Mount an SD Card on Your Android Phone How to Unmount (Or Eject) Your SD Card

For the most part, the term “unmount” has been replaced with the much more familiar term “Eject” these days, because it essentially means the same thing (although don’t expect your SD card to pop out of your Android phone like a VHS tape).

Most of you will know this already, but just to be sure, unmounting/ejecting doesn’t erase the data from your SD card (not to be confused with formatting, which will completely wipe your SD card).

SD Card Not Detected by Phone

The main options you want to select in the new window are “exFAT” and a 1024kb unit size, which is a good default to have.

If that doesn’t work, you should try inserting a different microSD card into your phone to work out whether the problem is with the phone or the card.

Using SD Cards without an SD Card Slot

Even though newer Android devices are being shipped with increasingly more storage, you may still want to use an SD card to quickly back up files to external storage. If your device doesn’t have an SD card slot, you may still be able to technically mount an SD card on your Android device. You’ll only be able to use it for file storage, but it gives you an extra option.

You’ll need an on-the-go USB cable adapter. If you have a micro-USB charging port, you’ll need something like the UGREEN Micro USB 2.0 OTG Cable On The Go Adapter. If you have a USB-C charging port, you’ll need something like the JSAUX Type C OTG Cable. Attach a standard USB flash drive or USB card reader to the Type A end and the other end to your Android device.

Use your desired file manager to move files to your SD card or USB drive from your Android device. Remember, this is just for file storage, not app storage.

Wrapping Up

You should now know everything there is to know about the increasingly integrated process of mounting and unmounting (see ejecting) an SD card. If PCs are anything to go by, we may reach a point where you can just remove SD cards without having to “Eject” them first, but for now, keep playing it safe and do your mounting and unmounting in accordance with our guide.

Want to use your SD card as the Android internal storage? Just follow these steps.

Crystal Crowder

Crystal Crowder has spent over 15 years working in the tech industry, first as an IT technician and then as a writer. She works to help teach others how to get the most from their devices, systems, and apps. She stays on top of the latest trends and is always finding solutions to common tech problems.

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Raspberry Pi Not Reading The Sd Card? Fix It In 2 Easy Steps

Raspberry Pi not reading the SD card? Fix it in 2 easy steps




Probably the most common error with Raspberry Pi is a corrupted SD card, mainly due to improper shutdown or power failures.

There is not much you can do when this happens, but we’ve listed an additional option besides the fresh re-install.

For other issues that you might have with your Raspberry Pi, visit our Raspberry Pi errors hub.

Also, we have a lot of useful guides in our

Developer Tools

section, so you should check it out.



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On the first boot, the Raspberry Pi needs an SD card with the OS mounted on it; otherwise, you can’t go any further.

Many Pi boards come with a microSD card with the NOOBS (New Out Of the Box Software) installer; of course, you can also have your own standalone image. Whichever method you use, it is recommended to use an 8GB for SD card or higher.

But what’s most important, is to use a reliable SD card manufacturer. Now, you might probably not know from the start whether you’ve picked the wrong one, but buying only from authorized suppliers and doing some research on recommended SD card brands for Pi might be helpful.

When booting, you will know that there’s a problem with the SD card if the red LED is blinking, while the green LED is not. Or, the green LED can blink regularly (3 to 8 times) to indicate that there’s a problem with the card.

How do I fix the Raspberry Pi SD card issues? 1. Mount a fresh OS image

Format the SD card in another PC, using SDFormatter. (If the formatting fails, the card is broken.)

Get a clean OS or image from here.

Save and insert the card in your Raspberry Pi to see if it works.

This is the standard recommended solution to fix a faulty microSD card. However, users complained that the Pi fails to recognize the card all too frequently and that they have to re-install a fresh image over and over again.

It is very frustrating, which is why the next solution might be helpful, but only after a first successful first boot: namely to make a read-only copy of the OS on a USD stick or another media device.

2. Make a read-only copy of the SD card

Copy the Raspberry image to your SD card.

Boot normally from the card, but

don’t Expand filesystem. Set

up time zone and international settings.

Run sudo fdisk/ dev/mmcblk0 and press p to print the current partition table.

Then enter the following commands:

Modify the /etc/fstab  as follows:

Run sudo partprobe to recognize the partition.

Format the new partition with sudo mkfs –type ext4 /dev/mmcblk0p3


If you then need to make changes to the system, you can remount the read-only partitions with write access sudo mount -o remount, rw /dev/mmcblk0p2 .

Additional info

Users have reported that their SD card was functional when inserted into another Raspberry Pi board – usually an older version than the one that didn’t boot. In the end, they solved the problem with a new card.

Sometimes, just taking the SD card out and rebooting can fix the issue.

It was also mentioned that the plastic holder of the SD card might have been the problem since some Pi version is very picky about these details.

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Sd Card Won’t Format? Here’s How To Fix It

When your SD card doesn’t format, there’s usually an issue with your access to the card or an issue with your device preventing you from formatting it. While using another device is always an option, it’s best to know the reasons why your SD card won’t format.

Depending on the device you’re using and the way the SD card is connected, there are a few different causes and fixes that may or may not apply to your situation. 

There are a few reasons that a person might want to format an SD card. For example:

You should format a new SD card to ensure that it’s error-free and set up for the device you’re using. This is why devices like cameras, phones, and others can format. They prepare the card for use by that specific device.

Formatting a card can erase the data and leave space for new information to be saved to the card.

Formatting an older SD card can help remove any errors or mistakes on the card. That enables you to prevent problems with saving files in the future.

Formatting an SD card on a computer also gives you many options about exactly how you want it formatted. That’s why it’s so important to know which device you’re going to use the card on and what file system it prefers.

Your SD card might not format because of a problem with your device or because the card is protected. Many SD cards can have multiple kinds of write protection to ensure no valuable data is deleted. 

You can usually fix problems that prevent your SD card from formatting. If you’re unable to format a card multiple times after trying each solution, the card itself might have an error. At that point, it’s time to start considering replacement SD cards. 

Start by checking that the SD card is ready to format. After that, address issues with the device on which you’re trying to format the card. 

Before you start, you must back up any data on the disk. Not only does formatting delete the data on the SD card, but some of the solutions can make it harder to retrieve the data later if the drive is damaged or corrupted. Before starting any drive troubleshooting, the best thing to do is to be sure anything on the drive is saved elsewhere. 

Two kinds of write protection can be applied to SD cards. One is a physical write-protection that you have to manually take off with the card in your hands. The other is software protection applied from a computer.

If your card is write-protected, you won’t be able to format it. Check for physical write protection first and then check using your computer. 

If your card has a notch on the side, you may need a piece of tape to complete the process. That notch can prevent some devices from accessing the SD card. 

If it works this time, the physical write protection was the issue. If it doesn’t, check for software-based write protection next.

Windows PC

Use the Diskpart utility to change permissions for your SD card.


Doing these should remove any write protection from your card. Try to format it again to see whether the problem is solved. 

If you still can’t format your card – even if you’re using a device other than a computer to complete the format – try formatting it on a PC so that you can use Disk Management. Sometimes, after you complete a format in Disk Management, you can reformat the card in the device that will use it. 

If the card still doesn’t format, you can try using Diskpart again to clean it.

When you use the Clean command in Diskpart, you’re telling the program to wipe all the data from the SD card and turn it into unused space. You can create new partitions on it once it’s clean and set it up for future use as well.

You should end up with a freshly formatted NTFS SD card. You can also choose to replace NTFS with FAT32 if you prefer to format it for devices that use the FAT32 file system.

Sometimes changing the drive letter of the SD card will help your device format it. You can choose any unused letter on your system.

If you can format it in Windows after changing the drive letter, try doing it again in the device the card is destined for. CHKDSK

The CHKDSK utility on Windows scans drives for errors and tries to fix them. As long as the card is connected to your computer, it’s treated as a drive. This means you can use utilities like CHKDSK to find problems on the SD card that prevent it from undergoing a format. 

If CHKDSK finds problems but cannot repair them, you might need to consider purchasing a new card. 

If you’re only having trouble resetting it on a specific device – like a phone or a camera – try resetting the device to default settings. It could be a problem with the device itself that prevents the card from formatting.

This is a last-ditch resort that might help – but often, if you come to this point, the card simply doesn’t work. 

Unfortunately, an SD card that can’t be removed from read-only mode and won’t format is often a dead SD card. It saves the data on the card and warns you not to use it anymore when it doesn’t work any longer and has damage or unfixable errors.

If your SD card has reached this point, check out other options. It’s better to buy something new than risk losing your data with a dead card. Also, don’t forget to check your warranty. Sometimes you might be able to get it replaced for free. 

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