Delete maps C4 Grand Piccaso 2015

I´ve update my navigation, but i took to many maps and can not install "scandivian map", because there is only 487mb free, and "Scandinavian Map" is 662mb

Is there a way to delete/remove some other maps ?

SMEG5.4.B.R6

Map Version: DbDw_303/Gr_411

I used the "russian way" :-)
Post #10 http://**************.com/forum/peug...ps-update.html