Warning: Avoid 32GB Chromebooks unless you are comfortable flashing custom firmware (MrChromebox). Standard Batocera installation on Chromebooks is tricky.

Yes. Use the Batocera backup script.

When you flash Batocera, it automatically creates two partitions on your 32GB drive:

The critical issue: Windows cannot read EXT4 partitions natively. You cannot simply drag-and-drop ROMs using Windows File Explorer out of the box.