Data slug

A data slug is a small, rectangular object which can store significant quantities of information in a small, compact package.
Fiction
IDW Generation 1 continuity
Ironfist, knowing he didn't have long to live, transferred the Aequitas data onto a single data slug, which was given to Prowl by Ultra Magnus. Prowl was tempted to destroy the slug, and with it, all the evidence of Autobot crimes it contained Last Stand of the Wreckers #5, but he apparently resisted temptation, as it was later seen intact on his desk. Police Action: Prologue
And, in any case, Ironfist had left a tablet-sized backup slug, containing a secondary copy of the data, with Verity Carlo in case the Autobots deleted the data. In Word and Deed
After finding Overlord deep in the bowels of the Lost Light, Red Alert left a data slug containing evidence of his discovery with the comatose Rung. Unfortunately, a Diagnostic Drone had recorded this, and a mysterious figure removed it after Alert had left. Rules of Disengagement
Notes
- Unlike a floppy disk, there is no evidence a single data slug can store a Transformer's entire core consciousness.

