My mother lives 30-45 minutes away by car, city traffic and all. She asked me to prepare some files for her and put it on her laptop before she travels next week. So I prepared everything, and in theory I could have done it remotely, it was only 5GB of data, but I decided to pay her a visit and I put this stuff on my USB stick and I plug it into her laptop and ... USB drive is not formatted.
What!?
When I got home I saw my USB stick is BTRFS!
Okay, mother, you are getting Linux soon.