HELP:

I have a Garmin 50LM with U.S maps installed and lifetime updates.
Everything works fine and I get free application and map update from Garmin.

Now, I also have a SD card with Europe NTU 2013.41 map and JCV file. (thanks to this forum)

I was going to update my unit but I got a message that there isn´t enough space on my unit.

Can I somehow get this update BUT in SD card, since there is a lot of space there.
If Yes, please how?

Garmin 50LM - need space to update software and US maps.

My SD card:
SD card namn: Garmin
1 folder called Garmin with one folder JCV and one file gmapsupp.img