I searched for "01x003E" with the explorer search engine on the entire sd, and it didn't find any matches.Backup your folder named "01x003E" contents, delete from SD card. Restart console.

So the only way to fix it is to format the micro SD?the Program ID 010000000000003E is OLSC services
OLSC is a sysmodule designed for handling the online savedata cloud backup system introduced in firmware 6.0.0.
so you probably have a bad savedata, as stated on the thread. you SD Card is corrupted, you can use the posts on that thread to try to recover them.
also was a bug on Atmosphère 1.02 but that was corrected so many time ago.
backup your card, format it and test using H2wtest then try to recover your data.

So far, yes, backup your card, start over. and do not forget to test the card using H2wtest.So the only way to fix it is to format the micro SD?
I understand. The problem is I already have backups. I was trying to transfer them to my new switch. I guess I need to identify which one is corrupted, because otherwise the same thing will keep happening to me.So far, yes, backup your card, start over. and do not forget to test the card using H2wtest.
with the backup you can extract the savegames using the method described on the thread.