Having followed MS's advice, it doesn't appear to work!
I have a Tablet with only 20+GB as its C:\ Drive (it is based on a 32GB device but at least 8GB is allocated as a hidden "Recovery", that is no longer used on Win 10.
OneDrive is currently using over 2GB of my minuscule availability on C:\ Drive
MS advise that it can be relocated to an NTFS formatted SD Card, but following the Win 10 Instructions I simply keep getting the message:- "Your OneDrive Folder cannot be created in the location you have selected".
Needless to say, MS doesn't bother to explain why it will NOT create it there!
NB:- There is a Microsoft OneDrive Trouble-Shooter (for Win 10) but, when running it on Win 10, it declares that it is NOT for that Win version!