APM mapping drives in RDP session

Hi

I'm trying to configure access to local drives for APM access to RDP servers

When I check "Drives" in "Access to Local Resources" , it shows me all the user local drives there

And I need only to expose drive C:\ local drive

And I mean the user local c driver , whats called drivestoredirect

Some tried to configure this ?

Should I use Custom Parameters in addition to Drives ? If yes then which syntax

I saw this: https://www.donkz.nl/overview-rdp-file-settings/

but the syntax drivestoredirect:s:C:\; not working

Thanks