only scan specific folders in Server, SBS and Multi Server Posted December 1, 2017 · Report reply Perhaps I should have more correctly stated that Instant Scan only works on Windows Hosts with NTFS volumes (and NTFS Journals), and the Retrospect client installed directly on the host. NAS boxes share files use the open source SAMBA suite to present files using the SMB / CIFS protocol independently of the underlying file system. Most NAS Units run a variant of Linux and use EXT, ZFS, or BTRFS file systems under the hood, all of which are journaling file systems, but not NTFS, and hence would not work with Instant Scan. Even Windows NAS Servers ( Windows Storage Server) present their NTFS files as SMB/CIFS shares. (But of course, being Windows, you could install the Retrospect client on them and take advantage of Instant Scan because they DO use the NTFS file system under the hood) I do also admit that my approach would not reduce Volume Scan times, whereas Lennart's approach would.