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USB Flash Drives: Speed, Capacity and Connector

USB-A, USB-C and dual-connector flash drives from small sticks to terabyte models for carrying, sharing and backing up files. 1,099 products from $2.99 to $1,195.99. SanDisk, Kingston Technology Corp., VERBATIM and more.

1,099 products from $2.99

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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Which USB standard actually sets the speed

The USB label matters more than the capacity for how fast a drive feels. USB 2.0 tops out at 480 Mbit/s, which in practice means a few tens of megabytes per second. USB 3.0, USB 3.1 Gen 1 and USB 3.2 Gen 1 are the same 5 Gbit/s interface under three names, and Gen 2 doubles that to 10 Gbit/s. The speed is only reached when the port on your computer supports it too.

Read the speed figure on the box carefully. A claim such as up to 400 MB/s refers to reading; writing is usually slower, and writing is what you wait for when copying a large folder onto the drive. Entry-level sticks may write far slower than they read, and sustained writes can drop further once the drive's internal cache is full. For video, disk images or frequent backups, look for a drive that quotes a write speed as well.

Type-A, Type-C or both, and how to format it

Type-A is the classic rectangular port found on desktops, monitors and many TVs; Type-C is the small reversible one on recent phones, tablets and laptops; dual-connector drives carry both. A Type-C plug does not guarantee fast transfer, so the USB standard still decides the speed. Larger drives are commonly formatted as exFAT, which both Windows and macOS read and write and which handles files over 4 GB, while FAT32 cannot hold a single file that large and NTFS is mainly for Windows.

Questions about USB Flash Drives: Speed, Capacity and Connector

Is USB 3.2 Gen 1 the same as USB 3.0?
Yes. USB 3.0, USB 3.1 Gen 1 and USB 3.2 Gen 1 all describe the same 5 Gbit/s speed, renamed over time. Gen 2 doubles it to 10 Gbit/s, and you only benefit if both the drive and the port you plug it into support it.
Why does my drive show less capacity than the label says?
Makers count a gigabyte as one billion bytes, while Windows reports in binary units, so a 128 GB drive shows about 119 GB. The format also takes a little space for its file tables.
Do I need a Type-C drive for my phone or tablet?
If the device has a USB-C port, a Type-C or dual-connector drive plugs straight in. Otherwise you need an adapter. Also check that your phone supports external storage, because not every device or operating system version mounts USB drives.