This is an SSD drive with a 512 GB storage capacity. The form factor is 2.5" the most common for SSD drives.
From Amazon
Verbatim Vi550 S3 SSD - internal SSD 512GB - Solid State Drive - 2.5'' SATA III interface - internal SSD drive with 3D NAND technology - high performance SSD 512GB - 560MB/s - black
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