what should I do? My all files are deleted after a reboot, and the settings fly off

Answer 1

are you using a live usb boot?

Answer 2

I when take out my taskbar disappears and
closing cross at windows

Answer 3

how did you install Linux mint?

Answer 4

I install linux mint on usb using etcher, after this i went in bios or uefi and open linux

Answer 5

that's what I suspected, that's just a live usb boot. it's not persistent. either make the usb persistent or install the Os to a partition of your hard disk.
google "how to make live usb persistent"

Answer 6

Which good sources for it exists?

Answer 7

are you using windows to create the usb?

Answer 8

I already on mint

Answer 9

this thread is going to be long, better if we chat.
what I meant is, what system are you using beside the Mint USB?

Answer 10

I use also my android

Answer 11

the way to make the USB persistent, depends on what operating system you are using when you plug the USB drive into your computer.
https://www.howtogeek.com/howto/14912/create-a-persistent-bootable-ubuntu-usb-flash-drive/

Answer 12

I can not

Answer 13

Help me please

Answer 14

You don't have back up in your Google drive