The SM2256 is a 4-channel IC using a 32-bit RISC CPU supporting 2D/3D MLC and TLC NAND as well as AES 256, TCG and Opal encryption for added security and it also supports the DevSleep ultra-low power state. The controller is a Silicon Motion SM2256KAB. On the other side of the PCB sit the controller, four more Micron 16nm 64GB NAND packages giving the drive a raw capacity of 512GB, and a cache IC. One side of the board is home to four Micron 16nm 64GB TLC NAND packages carrying the FBGA code of NW784, which gives the part number of MT29F512G08EMCBBJ5-6:B when put into Micron's FBGA decoder. The drive is built on a compact PCB that only fills about three-quarters of the enclosure.

To get to the drives internals its just a matter of undoing the four tiny screws on the sides of the drive, two of which are hidden under a pair of void warranty warning stickers. Transcend's SSD220S is built on a standard 7mm, 2.5in format using a good quality metal enclosure. There's not much in the box beside the drive a warranty card, a quick installation guide, four fixing screws and some very small but useful catalogues of other Transcend products. The remaining text is a multilingual marketing list of some of the drives other features. There's a list of the drive's specifications and performance and a checklist of what's in the box. The rear of the box has a sticker with the drives product number, capacity and NAND type. The front of the Transcend SSD220S 480GB box has an image of the drive, its capacity and a list of three of the drives features.

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