This is the Seagate One Touch 4TB portable hard drive, a 2.5-inch external drive with a textured metal finish that sets it apart from Seagate's plainer plastic-bodied Expansion/Basic lines and gives it a more premium desk-and-travel look. Beyond the styling, One Touch adds real software features: automatic file synchronisation and an auto-save capability that keeps a nominated folder continuously backed up in the background, plus Seagate's Sync Plus service, a full year of Mylio Create photo management software, and four months of Adobe Creative Cloud Photography plan membership bundled in the box. At 4TB it's aimed at everyday users who want meaningful capacity and a genuinely useful software bundle rather than a bare drive. It connects over USB 3.0 (USB 2.0 backward compatible), is fully bus-powered, and the black metal-finish enclosure measures a compact 115x80x21mm. Seagate backs the One Touch portable range with a 2-year limited warranty.