If it is compatible for Xbox 360 then you should be able to use it for the Xbox one. There shouldn't be any issues.
yes it is
yes, you can. you can copy music to the xbox 360
You can't transfer files on xbox 360 using a usb thumb drive, but you can if you buy a xbox 360 memory card
No because xbox do not have windows
You can.
You can format and use a USB flash drive as an Xbox 360 storage device and store up to 2 terabytes (TB) of content.
because your xbox 360 hates you
For Grand Theft Auto: V, there will be an initial install on Xbox 360 that will require an Xbox 360 Hard Drive or an external 16GB USB flash drive with at least 8 GB of free space. If using a USB flash drive it must be at least USB 2.0 with a minimum 15mb/s read speed and formatted for Xbox 360 use. A new USB flash drive is recommended to ensure optimum performance.
Yes
no
No, It will not save game memory.
there is a little slot on the side of the xbox it folds in and there are two slots for them