How to register a drive as a sync root for the cloud sync provider

Question

I want to register a disk drive (say D drive) as a sync root for a cloud sync provider built on top of windows cloud filter APIs.
When i tried passing the drive path "D:\" as the syncRootPath to the cloud filter CfRegisterSyncRoot API, it fails with HRESULT
error code as ERROR_*FILE_*CORRUPT.

I want to check if there is any specific configuration which would make this possible ?
if not, is this a limitation from the OS or a possible bug ?

//
// MessageId: ERROR_FILE_CORRUPT
//
// MessageText:
//
//  The file or directory is corrupted and unreadable.
//
#define ERROR_FILE_CORRUPT               1392L

HRESULT CfRegisterSyncRoot(
  [in] LPCWSTR                    SyncRootPath,
  [in] const CF_SYNC_REGISTRATION *Registration,
  [in] const CF_SYNC_POLICIES     *Policies,
  [in] CF_REGISTER_FLAGS          RegisterFlags
);

Answer 1

Hello,

Welcome to Microsoft Q&A!

According to the thread: https://github.com/nextcloud/desktop/pull/3290

CfAPI doesn't work for root partitions on Windows (drive letters like c:/, d:/, e:/, etc.).

If you want to use a root partition as a sync folder, I suggest you could try to create a subfolder under D:/ in your case.

Thank you.

Jeanine

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