How to get informations of a drive inside another ms graph sdk

I am copying a file from a drive to another drive using ms graph sdk in c#.

To copy into a drive i have to get the parentReference of the destination drive.

I use the code below :

var parentref = graphClient
  .Sites[IdGestDoc]
  .Drives[DriveId]
  .Root
  .Request()
  .GetAsync()
  .Result;

var parentReference = new ItemReference
{
  DriveId = DriveId,
  Id = parentref.Id
};

It is working well when I try it using the Drive ID of the root drive.

But when i try to use this line with the Drive ID of a subdrive, it returns the following error message :

The provided drive id appears to be malformed, or does not represent a valid drive.

I thought I could use the code for any drive ID, but it appears to be not true.

So how could i get the same information for the subdrives as the root drive?

For more details, the Id of the root drive looks like this :

b!07TT1TT6TTOI-xYElkDOj9a5a_hmu6RDt0mpVQfH3RFpCR1wxODCRpss4Xq4g75t

On the other hand, the Id of a subdrive looks like this :

01QVACJXG2T46MR734INA24SEQ3LZYRIZR

It is pretty obvious that there are two different types of IDs, so i am getting the error message. That's why i am asking how to get the information to fill the parent reference object for the copy of a file is successful?