SD card no longer recognized

I have a Samsung Galaxy A425G, my wife has an A14e (?). We switched our phones to T-mobile last year and I purchased 2 SanDisk SD cards, inserted each properly, was not prompted to format the disk on either phone and when I run diagnostics, neither phone recognizes the SD cards.  Except for occasional connectivity issues, we've had no other issues. Are SD cards absolutely necessary for full phone operation and capabilities?

Thank you!

is it new and just put in or its been in his phone this whole time and now its not recognized? are the pics in there currently showing as corrupted?

I'm having the same issue as the original post... My son's SD card wont recognize in his Galaxy S8 phone?

Thanks for your kind reply. I’ve followed steps in this tutorial: https://iboysoft.com/data-recovery/sd-card-not-showing-up.html. I went to Disk Management and saw the SD card. I tried repairing the card with chkdsk command lines. But Windows failed to fix errors on the SD card and popped an error message: “Chkdsk is not available for RAW drives”.  So I had no idea but to reformat the card. To avoid data loss, I used iBoysoft Data Recovery recommended in the post. I have good luck with that software. 

I hope this will help someone who are facing the same issue.

in your Google backup settings what all is it backing up? if pics are included then they should be stored

Yes, I’m using Google backups. But I can’t see any wanted files in Google sync. Should I use any data recovery software? Any recommend?

SD cards have a lifespan. as much as i hate to say it it might be at the end of said lifespan. it should normally still be able to be recognised though

which pic gallery are you using? if its Google Pics then it might have backed everything up for you

Hi, I have the same issue. I tried to reboot, clear system cache, reinsert. When I connected the  SD card to my Windows computer and intended to back up data, my computer also won’t recognize the card. What should I do? The data in the SD card is so important for me. Any idea?

Hello again All.

I have Samsung Galaxy S8, it's running Android 7.0. I've tried everything Mike mentioned except getting a new SIM card. Backed up the device, Forced reboit, cleared cashe, Factory reset, reset and manually entered the connection settings, ran multiple virus and device cleaners and uninstalled everything I didn't really need or use, and ran several speed tests. It just is slow and doing weird stuff. Says I have approximately 40GB free space. Last thing to do is get a new sim card, but I think I'll just get a new device if I have to go that route. I'm out of ideas. But open to anything further.

Yowch, @pmedic-27​ and @sshields1978​ -- sorry that this same problem just cropped up for both of you! What devices are you using and which SW version are you on now? Do you mind letting us know what troubleshooting steps you've already walked through -- any of those listed by the OP or any of the ones that Mike recommended?

Side notes:

@pmedic-27​, welcome, and thank you so much for hanging around with us for so long! We don't mind gurus, ex-gurus, or growling -- we just want to help you figure out your SD card. 😊 The post is marked as "assumed resolved" because the OP didn't return to let us know the end result -- I'm sorry if that's irksome! It's honestly intended to be transparent that we never really got to the bottom of this, but we're hoping that the OP didn't come back because they worked the issue out on their own.

@sshields1978​ - welcome to you, too! I am sending a PM your way about your username, please take a peek at your inbox when you have a second! Thanks! 😊