Synology DiskStation DS1520+ is an ideal network-attached storage solution suitable for small office and IT enthusiasts.

The DiskStation 920+ is identical to the DS720+ except it comes with more memory and 4 disk bays making it a excellent choice for use as a plex media server and more. The DiskStation 418 is the lowest cost 4 bay nas for a backup device, file server or low budget media server.

The DiskStation 220+ is a powerful choice for use as a plex media server and more. The DiskStation 220j is an incredible value for a backup device, file server or low budget media server.

One bay NAS drive are cheaper than the two bay NAS enclosures but will they meet your requirements?

The DS220j, DS218play and DS218 are great devices that will excel as a file server, backup device and sync drive but fall short in transcoding. If you want a media server then get the DS220+. See the differences.