QNAP Systems, Inc. is pleased to announce Seagate Barracuda 7200.11 1.5TB (ST31500341AS) hard drive is supported by the entire TS-109/ 209/ 409/ 509 Turbo NAS series. "The good news is, our Turbo NAS users now have more choices when selecting the hard drive models and more storage space. For example, the TS-509 Pro supports up to 7.5TB storage capacity," said Laurent Cheng, Product Manager from QNAP. The HDD compatibility list is available here. The TS-409 and TS-509 series supports Online RAID Capacity Expansion which allows increasing the storage capacity by replacing the hard disk drives with the data reserved and not turning the server off. To read the online tutorial, please visit this page.