Hello, I have RB750Gr3. I uploaded my hotspot files on Disk1 on USB pendrive. When I select the path for that folder in Winbox it just adds /flash folder before it.
Example
It will change it to:
/flash/disk1/hotspot/hotspot1
A similar problem is with SMB. When I add /disk1 share it just creates a folder in /flash/disk1 and it would be my share not /disk1.
In FTP I can access entire root folder.