I have tried everything I know to do - and have read the manual - to do a
"All Resources" Backup to a thumb drive. I have tried a dozen different ones of all sizes under 64 gigs and each time I get a write protect error and the backup fails.

The odd thing is two of these thumb drives I use on a daily basis with the PA4X with no issues at all. Direct access works ok. I can copy and past to these thumb drive and I know they are not write protected. So, what is going on here?