Turns out all you need to upgrade a PS4 to 4TB internal Storage is a Dremel and a 3D Printer : r/PS4
Here's How I Installed A 4TB External Hard Drive On My PS4
Avolusion HDDGear Pro 4TB USB 3.0 External Gaming Hard Drive (for PS4, PS4 Slim, PS4 Slim
Seagate 4TB PORT GAME DRIVE PS4 - Micro Center
Seagate 4TB External Game Drive for PlayStation 4 | GameStop
Toshiba 4tb External Hard Drive Disk Hdd Hd 4to Portable Storage Device Usb 3.0 Sata 2.5" Harddisk For Computer Laptop Ps4 - Portable Hard Drives - AliExpress
WD 4TB USB 3.1 Gen 1 External Hard Drive WDBM1M0040BBK-WESN B&H
WD PS4 Game Drive 4TB External Hard Drive Black | Techinn
Seagate Game Drive 4TB External Hard Disk Drive For PS4 Black| Techinn
Amazon.com: Seagate Game Drive 4TB External Hard Drive Portable HDD - Compatible With PS4 (STGD4000400) blue : Electronics
Seagate Game Drive for PlayStation Consoles 4TB External USB 3.2 Gen 1 Portable Hard Drive Black STLL4000100 - Best Buy
Avolusion 4TB USB 3.0 Portable External PS4 Hard Drive (PS4 Pre-Formatted) HD250U3-X1-4TB-PS -
Seagate Game Drive for PlayStation 4TB External Hard Drive Portable-USB 3.0 (Black) - Walmart.com
Amazon.com: Seagate Game Drive 4TB External Hard Drive Portable HDD - Compatible With PS4 (STGD4000400) blue : Electronics
Amazon.com: Seagate Game Drive 4TB External Hard Drive Portable HDD - Compatible With PS4 (STGD4000400) blue : Electronics
Seagate Game Drive for PlayStation Consoles 4TB External USB 3.2 Gen 1 Portable Hard Drive Black STLL4000100 - Best Buy
Best PS4 external hard drives 2023: The best HDD and SSD options | GamesRadar+
Seagate Game Drive for PlayStation 4TB External Hard Drive Portable-USB 3.0 (Black) - Walmart.com
Seagate Game Drive for PS4 4TB External Hard Disk Black | TeqFind
Amazon.com: Avolusion HDDGear 4TB (4000GB) 7200RPM 64MB Cache USB 3.0 External PS4 Gaming Hard Drive (PS4 Pre-Formatted) - PS4, PS4 Slim, PS4 Slim Pro - 2 Year Warranty : Video Games
Seagate Game Drive 4TB Portal HDD for PS4 PS5 [ Black ] NEW 763649119389 | eBay
Amazon.com: Seagate Game Drive for Playstation Consoles 4TB External Hard Drive - USB 3.2 Gen 1, Officially-Licensed (STLL4000100) : Video Games
Amazon.com: Seagate Game Drive 4TB External Hard Drive Portable HDD - Compatible With PS4 (STGD4000400) blue : Electronics
Amazon.com: Seagate Game Drive 4TB External Hard Drive Portable HDD - Compatible With PS4 (STGD4000400) blue : Electronics
Seagate - STLL4000100 - PS4/PS5 - External USB 3.2 Game Hard Drive - 4 TB 763649173664 | eBay