goHardDrive.com - MaxDigitalData Gaming HDD Upgrade kit + Toshiba 2TB 128MB Cache SATA 6Gbps 2.5inch Internal Gaming Hard Drive (Pre-Formatted for XBOX One S & Firmware Installed)
The Xbox One hard drive upgrade guide | Eurogamer.net
Microsoft Xbox One Phat / S / X Replacement HDD Hard Drive 2.5" 500GB + System | eBay