Oh, interesting
In that case install to USB. Plug in 2 USBs, or 1 SD Card, 1 USB, and install Linux Mint to the USB. Done it before with Debian - this could be helpful: Full Linux install to USB potential problem and solution
You’d need 1 live session, 1 free USB, and do custom partitioning to install to the free USB
If it’s like my Phaser360S, you can get away with 2 partitions:
EFI (50 MB)
ext4 (rest of free space) on /
Make sure you selected the correct USB; it may be called “sda” and have the name of the USB
edit: by USB I mean only Flash Drive capable of storage. A B C are connector types and don’t have storage