I currently download abt 2M of data to my signs using a serial connection. This serial either comes from an ATA card reader or a Laptop or a PDA. The Laptops and PDAs are gradually losing the serial and the ATA cards are soon history. My plan was to enable my unit to read the little USB keychain disks which should be around for the lifetime of this generation of our product. This would make carrying the data from bus to bus very convenient.

Erik