An adapter assembly is disclosed that enables a memory card having a smaller length than a standard ExpressCard to be compatible with the standard ExpressCard slot. The adapter assembly includes an adapter having side rails configured to disable the ExpressCard slot ejector mechanisms. The adapter assembly further includes a tongue provided for rigidly connecting the adapter to a finger grip, which gets positioned outside of the opening of the ExpressCard slot upon insertion of the adapter assembly into the slot. The adapter allows a memory card having the approximate size, look and feel of a conventional CompactFlash card to be used in a conventional ExpressCard slot.