yes, nothing to do with resizing, its using the sdcard using ext4
thats not accurate 
it can use capital letters, but its case sensitive, that means that
if its referred to in the patch in lowercase it must be lowercase as a filename,
if its uppercase in the patch, must have the same filename
thats just how Pure Data works.
unfortunately, patch developers using mac/window don’t see this because they are case insensitive (and the USB stick was formatted to FAT32, so a windows format) - so really its ‘sloppy programming’
the ext4 used on linux is case sensitive( and much better than fat32 ), so it becomes evident.
there are a few factory patches which have this bug, which Id like to get fixed… but its not really that many, and its pretty quick to resolve once you see it… (as you’ve seen your told in PD console)