SD Card - max size and format

[Carcrashboy]

Thanks, will order some cards now, just checking as a recent upgrade failed and I am trying to work out why.

What was the error message received when it failed? Yes, it could be an SD card failure but it may be something else as well.

I had an issue when I received my upgraded 440 back from Devialet. I was having a problem uploading the config fIle.
I was sure it was the SD Cards, both of which are 4GB. After a number of conversation with Devialet support, and a number of emails, they finally figured out that the config file name was too long  and was causing an issue with the boot sequence. Once the file name was abbreviated and shortened to 20 characters the problem was solved. It may not be the problem in your case but worth trying.

To be honest the problem maybe caused by me. I recently went PC/Mac free so all activities now done via iPAD. My son will download files onto my new SD cards so I will see what happens then, but not for a few weeks as travelling. Will update post then.

FYI the problem appears to be that the software upgrade only partially worked but I did not have time to investigate further at the time.