While Sdrive and MyNAS are easy to configure, they differ in accessing data and managing the NAS from remote locations:
Sdrive is an application with file system integration. Once Sdrive is launched, a separate volume becomes available on your computer similar to a standard DAS or NAS. Sdrive also gives you access to NAS OS.
LaCie MyNAS provides direct access to the Dashboard using an internet browser and does not require additional software. However, file integration is not available with LaCie MyNAS so files must be uploaded and downloaded via the File Browser (see File Browser).