This SSD hard drive has a 500 GB storage capacity and works faster than an HDD drive. The form factor is 2.5" which is common for SSD drives.
From Amazon
Seagate Game Drive SSD for Xbox, 500GB, SSD External SSD, Portable USB 3.0, Designed for Xbox One, 2-Month Xbox Game Pass Membership, 2 year Rescue Services (STHB500401)
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Seagate 500GB Game Drive for Xbox SSD
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