Re: persistent directory on usb drive

If you want write privileges, why install the DVD to the thumb drive?
Why not instead install the OS to the thumb drive? The only live
CD/DVD distros I've tried that enable writes to disk require that you
write to a hard drive or other medium rather than to the CD/DVD.
(Read-only is a limitation of the data storage media the live distros
are designed for.)

I think I understand what you want to do but do not understand why.

Nb., you will probably be dissatisfied with performance unless you are
using a USB 3.0 thumb drive via a USB 3.0 connector.

Best regards,

Paul