Why are there no folder thumbnails for folders paired via Qsync?
Applicable Products
Qsync Client 5.0.0 Windows and later
Root Cause
Folder thumbnails for paired folders may not appear in Windows File Explorer if Space-Saving Mode is enabled in Qsync Client 5.0.0 Windows and later. Space-Saving Mode will by default remove local files while keeping files stored on the NAS. Folder thumbnails cannot be generated if the files contained within the paired folder were removed by Space-Saving Mode.
Workaround
To restore thumbnails for a paired folder, disable Space-Saving Mode for the folder in the Folder Pair Settings page of Qsync Client.
Folder thumbnail when Space-Saving Mode is disabled
Folder thumbnail when Space-Saving Mode is enabled