Will a scan of SpaceObServer change the last access time or any other timestamps of the file?
No, SpaceObServer does not change any time stamps of files or directories when scanning a file system branch. The scan engine works strictly read-only.
SpaceObServer does only access, read the file content if the MD5 checksum calculation is activated. However, in this case SpaceObServer uses certain API to ensure the last access time stamp should not be touched/modified.