Your data remain on your own local user devices and storage units assigned to your organization.
Sher.ly synchronizes the metadata of your files across each project members and devices. At no point is your data ever stored at Sher.ly. The file repository always remains under your control.
A storage device is a dedicated unit for storing data when Sher.ly Storage Server software has been installed such as Sherlybox, supported NAS or company Linux or Windows file servers.