DS215j separates into two parts
To gain access to the inside of DS215j one side must be pushed in a backwards fashion and then the unit will separate into two parts, as shown.
DS215j offers up to 12TB of storage
Once inside, there is a rack for mounting two HDDs. DS215j has support for 2.5 and 3.5 drives and offers a maximum capacity of 12 TB. To install, the drive needs to be slid into one of the slots so that it marries up with the SATA connections screws should be attached to keep the drive(s) securely positioned. (For 2.5 drives, screws can be attached to the underside of the drive).
We would usually take a look at the internal design and components within the NAS but since there is no clear way of getting inside the unit we must refer to the technical specifications instead. These are as follows:
CPU Frequency: Dual-core 800MHz 1.06GHz
Hardware Encrypted Engine + Floating Point
Memory: DDR3 512MB
Internal HDD/SSD: 3.5" or 2.5" SATA(II or III) X2
Max Internal Capacity: 12TB (2X 6TB HDD)
Since Synology didnt bring to market a DS214j for last years lineup we can only compare to the DS213j which had a single-core 1.2GHz CPU, the same specification of memory and 6TB of storage available. As they often do, Synology has made subtle alterations to the new DS215j adding in more capacity and boosting the CPU specification by giving consumers a dual-core model which will ultimately enhance productivity for multi-tasking.
Its important to also note we now have USB 3.0 support which is a great benefit for appliances which use this faster interface.