Can You Use an External Hard Drive with Xbox 360?

No—not for game installs or profiles. The Xbox 360 OS only supports its proprietary internal SATA drives (2.5" form factor, custom firmware) and licensed Memory Units (MU).

What *Does* Work via USB

• USB Flash Drives (up to 32 GB each, max 2) – Formatted as "Xbox 360 Storage Device" for saves, profiles, DLC, arcade titles.
• Media Playback: FAT32/NTFS drives for music, pictures, video (no games).

Internal Upgrade Options

• Official HDDs: 20, 60, 120, 250, 320, 500 GB (Microsoft / Seagate).
• DIY: Any 2.5" SATA HDD/SSD (9.5 mm) + 3D-printed caddy + hddhackr to flash Microsoft firmware (advanced, risks ban if done wrong).

For modern storage, use a 32 GB USB 3.0 flash drive (SanDisk Ultra Fit, Samsung BAR) formatted on the console—cheap, fast enough for saves/DLC.