Libra 2 Kobo Libra 2 restarting after ejecting

[Fiftybears]

Months ago I've upgraded the storage in my Libra 2, and it's mostly working perfectly, the only problem being around file transfers. When I transfer files and eject through calibre, about 50% of the time it's unresponsive for about a minute before it restarts, and the files I added aren't there. In the case it ejects and processes the books as intended, they show up as normal. This also happens whenever I update metadata through KoboUtilities.
Is this something to do with the storage being much bigger than it's supposed to handle, or is it just some form of user error I might have done when setting up the new card? Should I just overlook it and accept it as a quirk of the device now?

[PeterT]

How large is the card?

Sent from my Pixel 7a using Tapatalk

[Fiftybears]

It's a 512 gb, mostly for dreams of filling it with manga.

[Aleron Ives]

Have you checked the database integrity? It might be corrupt.

[DNSB]

Originally Posted by Fiftybears

It's a 512 gb, mostly for dreams of filling it with manga.

Have you checked to see if it is a real 512GB card? There are several sites that offer information and tools for detecting them. A couple are Identifying Counterfeit MicroSD Cards and Perform a Fake SD Card Test with Top 4 SD Card Checkers. ChipGenius is one tool I've used several times.

Several people have had issues when purchasing a replacement µSD card for their Kobos for rewriting the firmware image. Especially with cards purchased from Amazon whom do not seem to care about complaints that a vendor is selling counterfeit cards.