Seagate has introduced its slimmest external hard drive, a 320-GB model that’s roughly the width of a pencil and works with a Mac or Windows PC.

The GoFlex Slim, launched Tuesday, is 38% thinner than the previous GoFlex ultra-portable drive and weighs less than six ounces. The new product is about 5 inches high and 3 inches wide, making it easy to carry in a pocket or carrying bag. The Slim uses Seagate’s 2.5-inch Momentus hard drive for thin notebooks and netbooks.

The Slim’s black metal case includes a USB 3.0 port, which is compatible with USB 2.0, but can transfer data 10 times faster when connected to another USB 3.0 port. The internal hard drive is also quick at 7,200 revolutions per minute.

The Slim is formatted as a FAT32 file system, so files can be transferred from either a Mac or Windows PC. The drive comes with backup software and the ability to encrypt files.