Questions about Galaxy Tab A7 Lite

Hello Urs
The SW updates are done automatically. Perhaps not immediately after the first switch-on.... Sooner or later, the update will be installed during start-up. It is recommended to carry out the update with a WLAN connection. On my device, version 13 is in operation.
Greetings Sam

I bought the A7 Lite 2 months ago, actually only because it was so cheap and a strong battery was advertised. It's always the same with batteries: In the first year, the advertising is still half right, but from the second year onwards, the performance decreases and the phone is always stuck in the charging station.

However, I am still very satisfied with it and would buy it again. It's lying around

Yes, this is possible, you just need to choose a USB stick with a type C tip: Delock Mini USB stick (32 GB, USB C, 3.1)
Or one that has USB a and C: https://www.digitec.ch/fr/s1/product/sandisk-ultra-dual-drive-luxe-32-go-usb-c-usb-type-a-31-cles-usb-13084883.