About CodeMeter | Flash Disk
The CmStick versions that are marked with /M have an additional flash drive with up to 2 GByte memory.
You can store any data on the flash drive and so you can carry them comfortably with a bunch of keys. It is even possible to store the software that needs the CmStick on this hardware. For example you can have the LockZone communicator with your mail clients including encyption functions permanently with you.