Transfering Persistent mkusb Files Ubuntu to Windows
Mkusb can create a drive with a Persistent ext4 partition labeled casper-rw or writable.
It can also create a NTFS partition named usbdata.
The casper-rw or writable partition is only accessible if a program like DiskInternals Linux Reader in installed. The basic version is a Free program available from https://www.diskinternals.com/linux-reader/.
I have tried Linux Reader and it allowed me to read/copy everything on the Linux disk including home folder, which is located in the upper folder of the persistence partition.
The usbdata partition is accessible to Linux and Windows with out any additional programs. If Apple is included in the equation the NTFS partition can be formatted to FAT32 without any problem.
For data access on other Bootable USB systems see: Can we put files other than bootable files in a bootable flash Drive?
exfat-fuse
andexfat-utils
packages to read and write to exFAT from Ubuntu. – Nmath Jul 25 '20 at 22:03