Here's a great tip from Michael Schogger regarding the Compact Flash Cards we use in our Psion machines. Compact Flash Cards have a reputation of not being recognised in the 5MX and this has been well document already. And the good news is: here's a really good tip! If you have a Compact Flash Card that is not being seen or being recognised by your Psion, take it out of the Psion, insert the Compact Flash Card into a digital camera, and then format the Compact Flash card with/in the digital camera. Then remove the Compact Flash card from the digital camera, insert the card back into the Psion and Hey Presto, ... the Compact Flash card is now recognised and seen by your Psion.