The DiskStation DS1515+ from Synology is a 5-bay NAS server. It features a 2.4GHz quad-core processor and hardware encryption engine, delivering speeds of 450.77 MB/s reading and 396.5 MB/s writing. It has 2GB of DDR3 RAM expandable to 6GB.
The dedicated hardware encryption engine makes the DS1515+ great for keeping your data secure, as files and folders are encrypted on the fly without any perceived performance loss.
The DS1515+ can also be connected to dedicated DX513 expansion units for additional storage. If you connect two DX513 expansion units through the specially designed eSATA connectors, you can get up to 150TB of raw storage.
The Synology DS1515+ is easy to install and maintain with its hot-swappable hard drive support. It also incorporates a passive cooling design to reduce dependency on the dedicated cooling fan. When the system does detect a failure, there's a built-in redundancy mechanism that ensures continuous operation until the replacement fan arrives.
The DS1515+ has both USB 3.0 and eSATA ports to connect to various kinds of devices. The support for USB 3.0 offers transfer speeds of up to 5 Gbps.
This is a great option for a centralized backup target. Whether you're on Mac or Windows, you can back up everything on your computer directly to the Synology NAS using the Cloud Station Backup. Whenever you modify a file, the changes are backed up to the DS1515+ automatically. You can also back up data from the DS1515+ to another DiskStation, external drive, or even the Amazon S3 Glacier cloud service, Microsoft Azure, and more.