Hi folks,

my english is poor so exceuse my misstakes.
I spend hours with reading threads, but i'm litlle bit confused how to change something in navi.
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My unit JUNSUN is running with igo primo with EU maps from i think WW2. No its joke. Maps are very old, i think 2015 maybe oldest. navi work well but this SW is work in large lag, etc. 15fps on 2d view.

I think about update, because previous holder dont matters about it.

Q1: when I replace instaled SD card with new one (testing SD) , could I comeback with original SD like factory reset? I dont wanna brick it
Q2: if yes, could I ask to which version could work with my car-radio device?
Q3: is diference in use SD class10 and SD class10 UHD10?
Q4: is igo only one choice to run navi on win ce based unit?

If some one done with that in another thread, i'm apologize, just show where.
Any advice are wellcome. Hope no rules was broken.

Thank you in advance

Tomas