temeela [she/them]

Seems like your USB drive is formatted with a filesystem that doesn’t support large files like FAT32, if you are able to, try formatting into exFAT in Linux with:

sudo mkfs.exfat -n LABEL /dev/YOURUSB

or in Windows by right clicking on the USB and clicking format.

Go into your uBlock settings and purge the cache and update your filters, that should fix it, filters do usually keep up to date with YouTube but uBlock stores the old ones cached.