Hi,
To turn off Auto Save on your tablet, follow the steps below:
- Tap File> Save.
- Move the Auto Save slider to Off.

When Auto Save is turned off, you'll see the
Save button in the file header.
Let us know how it goes.
He is asking for word mobile on windows 10 tablets, not on android .. I have a windows tablet and office 365 account but no option to disable it.
Word Mobile on Android can turn off autosave and it's free, but Word Mobile on Windows 10 for PC / Tablet can not turn off this feature with spend money and must have office 365.
Seriously, Microsoft ??? You care other platform than your own platform? It's so annoying while i'm typing then always freeze 10 seconds.