The Siemens 6ES7791-2BA20-0AA0 is a kit solid state drive intended for the Field PG M3 programming device. This is a replacement or spare drive for the M3-series field PG, not a general-purpose industrial SSD.
Physical and Packaging Details
Packaging dimensions are 9.685 x 12.913 x 3.386 inches, which is a compact box suitable for counter or shelf storage.