[SOLVED] Persistence with Ventoy 1.29 and Mint 20

[longpanda]

You confuse two concepts. One is persistence file name,  another is the label of the filesystem inside the persistence file.
The file name of the persistence file doesn't matter, you can rename it to xxx.dat  abc.dat  123.dat ......

But the label of the filesystem inside the persistence file is very important and MUST be set as noted in the table here: https://www.ventoy.net/en/plugin_persistence.html

So the persistence dat file created by you is invalid and can NOT be used by Linux-Mint.
You should create as follows (without -l option or with -l casper-rw option):  

Code:

sudo sh CreatePersistentImg.sh
sudo sh CreatePersistentImg.sh -l casper-rw

casper-rw is the only valid label for linux-mint.