I'm pretty sure the registry key for DisableDriveRedirection only prevents the client's drives appearing on the machine you are RDPing to.

Maybe using that feature somewhat solves your problem of transferring files? Not as easy as copy/pasting though.

Local Resources tab -> Local devices and resources -> More
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)