I seem to be getting an underwhelming response to this post, so I'll edit.
1) I have new oregon 450, pc with win 7 64 bit.
2) I have been able to load one map and multiple routes to Basecamp.
3) I have been able to download the map and one route the device.
4) Since then, I am unable to download more routes. There is 600 MB internal memory which should be enough.
5) I purcased and installed an 8 GB micro sd card. Basecamp shows the device, the card, and a user data file on the card. I have tried dragging to this but still, ican't download mmore routes to internal memory or card. Any ideas, thanks.