Two very different products sit under this heading. A portable SSD is solid state, runs off the USB port alone and fits in a jacket pocket, which is what you want if the drive travels or if you edit straight off it. An external hard drive still buys far more terabytes per rand, and the 3.5-inch desktop models need a mains adapter and a permanent spot on the desk. Photographers clearing camera cards, console owners out of space, and anyone keeping an offline copy of their work all end up choosing between the two.

Start with the port you will plug into rather than the number on the box. A 10Gbps USB-C host settles near 1,000MB/s in practice; a 20Gbps drive only reaches its rating on the uncommon host port wired for it, and several USB4 and Thunderbolt controllers quietly step those drives back to 10Gbps. Cable quality decides whether you get the negotiated speed at all. After that, look at what happens on a long transfer: most drives hold their headline figure until the fast write cache fills, then settle at a lower steady rate that is the number worth knowing.

Evetech lists sealed portable drives alongside empty enclosures, so you can either buy a finished unit with one warranty or fit an M.2 stick you already own. Orders ship tracked from the Centurion warehouse, typically one to three business days to the major centres and three to five to regional addresses, and collection from Centurion is available if you would rather not wait on a courier.