DIGA Repair/Replacement/Capacity Upgrade 2TB HDD (Used for only 1 hour, like new) Type II ＜Compatible Models＞ DMR-BZT710 DMR-BZT720 DMR-BZT730 DMR-BZT810 DMR-BZT820 DMR-BZT830 DMR-BZT910 DMR-BZT920 DMR-BZT9000 DMR-BZT9300 DMR-BWT510 DMR-BWT520 DMR-BWT530 etc. This hard drive has the dedicated DIGA data for each listed model already written on it, so you can use it immediately after installing this hard drive and formatting it on the DIGA unit. (No troublesome PC settings are required.) This is a WD Purple drive for surveillance cameras, which is far more expensive and durable than the original HDD. WD Purple drives, with a maximum operating time of 1 million hours, are designed and engineered to provide reliability for 24/7 operation in surveillance cameras and security systems. If your original HDD is 500GB to 1TB, you can upgrade to 2TB. If it's a 2TB model, the capacity will remain the same. If it's a 3TB model, the capacity will be reduced to 2TB. This is an ideal replacement HDD (used for only 1 hour, like new) for symptoms such as: loud operating noise or unusual noises from the HDD, or HDD failure. Also suitable for when the HDD cannot be formatted due to an error detection. Note: Replacing the HDD will not fix malfunctions caused by other factors, such as a faulty control board. Recorded content will become unviewable if the original HDD is removed. Please save your recordings to optical media such as BD/DVD or to a USB-HDD registered to the replacement unit before replacing the HDD. HDD Capacity...2TB