Inside every Drobo is the revolutionary Beyond RAID storage technology that protects data against a hard disk crash, yet is simple enough for anyone to use. As long as you have more than a single disk in Drobo, all data on Drobo is safe no matter which hard disk fails. There’s no need to worry about anything else. Your library of data grows every moment & now your storage solution expands in seconds too. Drobo holds up to four hard drives, can expand at any time, & supports up to 16TB on a single volume as disk sizes increase. Choose how big you want your Drobo today with any combination of drives capacities. Yes, you can mix & match drive sizes. Check out the Drobo Capacity Calculator to try it out for yourself. Protecting your data from a hard drive failure can be a challenging task. Not with Drobo. As long as Drobo has two hard drives, it protects you from a drive failure. If a drive happens to fail, you do not lose access to data, which means that you can keep on working. Just swap out the failed hard drive & replace it with a new SATA drive of any size. Please note: networking components such as switches, routers, UPS & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.