PM1643a MZILT7T6HALA 7.68TB is an SSD type hard drive which can fit 8 TB of data. The form factor is 2.5" which is standard for SSD drives.
PM1643A - 7680 GB - 2.5' - 2100 MB/s - 12 Gbit/s
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Samsung PM1643a 7.68TB 2.5" SAS Enterprise SSD/Solid State Drive
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Samsung 7.68TB PM1643A 2.5" SAS Enterprise SSD