Heya Patrick
I'm gonna break down different parts of your sentences and answer them inline below here to try and help.
But it's a bit broken and ugly, so I've sent it off-list. Hopefully it helps you anyway :)
> If user A shares some files with user B and user B copies the files to a folder in their Google drive,
The word 'copy' here is a key phrase. Let's make sure were talking about the same thing. When user B adds user A's file into their 'My Drive', they are just making a shortcut back to the original A file. However if they choose 'Make a copy' then they get a brand new file, owned by themselves, over which they have total control (and which remains even if user A deletes the original file). Note there is a setting that A can put on a file to stop B being able to 'Make a copy' (in which case user B is fsck'd), but that setting is not on by default
So, again...
> If user A shares some files with user B and user B copies the files to a folder in their Google drive, even when they are not still sharing those files with A, A is still the owner of the files and B cannot share the files to someone else or even make themselves the owner unless A has previously granted that right to B.
IF user B 'moves' the file into their My Drive rather than COPYING it then yes correct thus-far.
> Regardless of whether A still even exists as a current account (so far as I can tell).
No! When user A no longer exists as an account (deleted), the original file owned by user A will DISAPPEAR from user B's My Drive. UNLESS when user A was deleted their files were transferred to some other user in their domain (say user C), in which case the file remains in user B's My Drive, but is now owned by user C.
Cool... With me so far?
OK, let's continue...
> the only way to change ownership of a file is for the current owner to make each file individually owned by B
Yes, OR B can choose to 'make a copy' of the files and then he'll own the new copies.
> it is not possible to bulk change this, for example if I set the ownership of a folder to B, the files in the folder will not automatically inherit the ownership from the folder settings.
But if user B makes a copy (assuming user A allowed this) it should be possible to 'Make a copy' of a folder at a time and get a reasonable number of files covered with one operation.
> <snip>
> it doesn't help at all that Google has not provided end users with a capability to bulk edit file ownership.
Agreed!
I'm not sure if GAM supports changing file attributes? I guess GAM isn't any use if this is between gmail accounts anyway rather than between gsuite accounts.
Anyway hope my rambling comments help.
Pete
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