Acer RC111 - Manual (Page 45)

45
Previous versions are enabled by default but can be disabled/enabled
manually through the Server Folders and Hard Drives tab. Opening a
hard drive's properties will display “Shadow Copy” options. Shadow
Copies is the technology that enables the use of previous versions on
the shared folders. Previous versions can be accessed from any
authorized user by right-clicking the file or folder inside the shared
folders. From the
Previous Versions tab, you can restore, copy or open
the previous version.