Synology makes some of the best NAS enclosures on the market and Amazon has quite a selection of them. Here’s a description from the Synology website:
Synology DiskStations solve a variety of problems for everyone from the casual home user to a system administrator at a large company. Sharing files, backing up several computers at once, streaming media, and hosting websites are just a sample of what these powerful devices are capable of doing.
Synology DiskStations are designed to make your life easier. From automated backup and remote access, interacting with your data has never been this simple.
Synology has a wide range of storage solutions for every budget. Synology DiskStations vary by number of bays, or the number of hard drives the model accepts, and the performance capabilities.