SD not recognized when almost full

[creedo]

I couldn't reproduce this, my card's never been near full but I brought the 8 GB card down to 6 MB left... just filling it with random junk... and both file explorer and total commander saw it fine.

What are you using to try to view the card? File explorer? Does nothing at all see it? Like if you do settings --> SD card and phone storage does it show up there?

At this point all I can guess is either the card is not a great brand, or it's getting old, or it somehow got formatted wrong. You could pull everything off of it and reformat it. Set it to be viewed as a hard drive under your connection settings --> usb connection ...then in windows format with a FAT file system. Then put your stuff back on it (try to bring it near full) and see if that helps.

If not, buy a new one and maybe get a new brand. I got the common-as-dirt sandisk brand, and it's worked fine for me. But I've only had it a couple of months.