Many photographers use a DAS (directly attached storage). This includes external hard drives and USBs. But when these fill up, you have to buy another. And pretty soon you have your files spread out over a pile of storage devices, which makes finding the file you need difficult. Also, when you need the file, you have to carry the storage around with you, and if you forget it at home, you’re out of luck. The solution? Network Attached Storage, from Synology.