Version 6 is only 48kb.
Then you have put other items on the eTrex 10 to not have enough space.
This try this link:
Worldwide Autoroute DEM Basemap NR 5.01 (49kb)
[Only registered and activated users can see links. ]
If that does not work try removing items you have install on the eTrex 10 to make room.
But copy them to your PC or Laptop.......
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