SanDisk has introduced the Extreme Fit USB-C flash drive, a device the American company positions as the smallest 1TB USB-C storage unit currently available. The drive is designed to remain plugged into a host device, functioning as semi-permanent storage rather than as a traditional external SSD. Its dimensions—approximately 18.5 × 15.7 × 13.6 mm—and weight of 3 grams make it comparable in size to a compact wireless dongle, allowing it to sit nearly flush when connected to a laptop or tablet. The connector orientation is L-shaped, raising the body slightly upward to keep the footprint minimal, though it protrudes enough to avoid conflict with a closing laptop lid.

The drive uses a USB 3.2 Gen 1 interface and delivers read speeds of up to 400 MB/s for capacities from 128GB to 1TB, with the 64GB model reduced to around 300 MB/s. These figures are adequate for transferring documents, photos, and general media files, as well as for basic backups, but they are not intended for sustained high-bandwidth tasks such as video editing or heavy scratch-disk workloads. Faster portable SSDs exist, though none in a similar size class.

Compatibility includes Windows 10 and later, macOS 12 and later, and iPadOS 15 and later, provided the device supports USB-C storage. The drive also integrates with the SanDisk Memory Zone app for file management and backup functions on Windows and macOS.

The company includes a five-year limited warranty across the lineup.