Hi all!

Yesterday I have purchased Garmin EDGE 820 for my cycling activities.
I have multiple problems with it such as:

1.) The time is wrong. It shows +5 hours and +10 minutes.
2.) I cannot upload .gpx routes in it. I do it manully by coping routes in NewFiles folder on my device and when I do that I lose my map in the device but the routes are there.
3.) When I upload map again via BaseCamp than I lose my uploaded routes eventhoug they are still in the NewFiles folder
4.) When I connect my device to BaseCamp I don't see that a map is installed in my UserData folder on the device eventhoug the map is on the device
5.) When I cannect my device to BaseCamp sometimes it's written GARMIN (F and sometimes it says Garmin EDGE 820

Software version on my device is 6.20
BaseCamp version is 4.6.2.
MAP that I use is OSM generic routable (Croatia)

Help my please.