Questions before map purchase

[zuku]

Hello,
I would buy cycling offline map from SHOCART, but before I do that I would ask:
-does purchased map will be lifetime? if not how long will be valid?
-can I backup purchased map and restore it, if I had to reinstall my smartphone?
-I would buy map by selecting area, if I made a mistake and select too small area, can I edit map after purchase and add more parts to it?

many thanks for respond.