I just spent the entire morning putting the coordinates of all my sites into an Excel spreadsheet (yea, more "work") 
I have an older GPS, the kind without maps, but I really know it well & like it & it "Gits R Dun". I have over 170 waypoints in there 
Whenever I saved a spot it would record the date & time. Well, all of a sudden the months are wrong & it thinks it's 1924! 
With all this valuable info in there I really should have backed this up along time ago. I'm lucky just the dates are wrong & it didn't wipe out all the numbers. Some of those sites deep in the woods like that mill site I would never ever find again with out this thing.......
I have an older GPS, the kind without maps, but I really know it well & like it & it "Gits R Dun". I have over 170 waypoints in there Whenever I saved a spot it would record the date & time. Well, all of a sudden the months are wrong & it thinks it's 1924! With all this valuable info in there I really should have backed this up along time ago. I'm lucky just the dates are wrong & it didn't wipe out all the numbers. Some of those sites deep in the woods like that mill site I would never ever find again with out this thing.......