Connection Problem and Missing tracks

When I connect my overland to the Mac and then try to synch me recorded tracks it doesn't work. either I get a beach ball and the basecamp app will crash or it doesn't show my overlader. Nevertheless in Garmin Express it shows as connected.

I then tried to synch the recored track via the eplore App no the overlander. It didn't allow my to sync. So I did a relogin. Now synch is working.

But I lost all my local recorded tracks or at least I can't see them in the explore App. When I look at the storage usage I assume they are still on the device.

How can I get back my tracks and then synch them to my Mac? Thank a lot for you help