The Atari 810 is the official floppy disk drive for the Atari 400 and 800, the first two models of Atari 8-bit computers. It was released by Atari, Inc. in 1980.
The single-density drive provides 90 kB of storage. The 810 has a data transfer rate of 6 kbps in most cases and a number of reliability issues. Third-party enhancements such as the Happy 810 address these problems, as do replacement drives like the Indus GT with more storage and other features.
At the same time as the 810, Atari announced the double-density Atari 815, allowing 180 kB per disk, with two drives in one case. It was never put into full production and only small numbers reached the market.
The 810 was replaced by the Atari 1050 with the release of the XL series machines in 1983. The 1050 was replaced in turn in 1987 by the XF551 with a double-sided, double-density 360 kB mode.