REGARDING STANDARD HARD DISK DRIVES (HDD): The Shield system software was designed to work with at least a solid state hybrid drive (SSHD). However,
SD Card vs. SSD: What Is Really the Difference? - Make Tech Easier
Set up new Hard Drive for the Shield
Nvidia Shield Pro Android TV Hard Drive Replacement - iFixit Repair Guide
Best Buy: ASUS G11CD Desktop Intel Core i5 16GB Memory NVIDIA GeForce GTX 1060 512GB Solid State Drive + 1TB Hard Drive Silver/Red G11CD-B13
Nvidia Shield Pro SSD Installation Part 1 of 2
Fantom Drives (Solid State Drive Upgrade Kit - Compatible with Playstation 4, PS4 Slim, and PS4 Pro, 2TB SSD + 16GB : Electronics
Shield Pro SSD upgrade : r/ShieldAndroidTV
NVIDIA SHIELD TV Pro Best Thing To Do When You Get It!
Nvidia Shield TV SSD - done, Page 31
Fantom Drives (Solid State Drive Upgrade Kit - Compatible with Playstation 4, PS4 Slim, and PS4 Pro, 2TB SSD + 16GB : Electronics