Troppo, on the SD card front. The Navi works properly with only 2.8v sd cards.
"Not all memory cards work in a NaviGPS. It is known that only 2.85v cards work. Any other voltage will not work, however it can be difficult to discover what voltage any particular card is.
" Known to work
The following cards are known to work:
SanDisk Ultra II - 1Gb/2Gb
SanDisk Ultra II Plus (with integral USB connector) - 512Mb
SanDisk Ultra II Plus (with integral USB connector) - 1.0Gb
SanDisk 512Mb, 1Gb
Panasonic branded 16Mb
Impact branded 256Mb
Kingston Ultimate 133x 512MB
Known to NOT work
"Canon" branded 32Mb
"Jessops" branded 512Mb (corrupts see below)
"Palm" branded 128Mb (corrupts see below)
Troubleshooting
The NaviGPS expects a FAT-16 file system so don't expect cards with more than 2GB to work.
The NaviGPS is a bit fussy about the formatting of the file system. If you have problems, try reformatting the card using the NaviGPS's built-in memory card format command. Cards formatted using Linux seem to be more prone to problems"
More can be found here..
wiki.openstreetmap.org/wiki/NaviGPSPS mail b/w Uk/Europe and Perth has always been good and fast.