I have a large RAID formatted as HFS+ and accessed through MacDrive on a Windows 10 system.
The files sync and are accessible just fine, but in some apps the directories created by insync are invisible. In particular, this shows up in Davinci Resolve, where files can be manually drag-dropped from insync folders into Resolve, but the app file browser can’t see the directories themselves.
On the same system, when syncing to an NTFS volume, all works as expected. Is there some reason an HFS+ volume would show this behavior in Windows 10?