@paradadf
thanks for your answer, i mean i use a lot of methods, no one worked, only post that because is the last method i use u.u and no work. in terminal shows the download of all systems but recalbox doesn´t show nothing thanks

why anyone make some video tutorials of this??? im veeeeeeeery noob on this i´ve been trying with a lot of methods (im in MAC) with no luck at all -.-, i let my computer work for 1 entire night apparently scrapping but after finish.... no images displayed on my recalbox (4.0 with Raspi 3)... any noob help please? last method i use was

Log in your recalbox in SSH like explained on the wiki then type those 2 commands :

wget https://raw.githubusercontent.com/substring/fullscrape/master/fullscrape.sh
chmod u+x ./fullscrape.sh
Now you can run fullscrape.sh :
./fullscrape.sh
Here are the possible options
-u : update mode only. It will just scrape roms that were not scraped yet. Quite useful if you already spent some time scraping, or if the previous scrape crashed
systemname : you can specify several systems seperated by space (nes snes n64 gb gbc gba megadrive mastersystem sega32x gamegear pcengine atari2600 lynx psx scummvm segacd mame fba fba_libretro neogeo)
Examples :
./fullscrape.sh : hold tight baby, will scrape everything in its way, dead or alive. You would usually run this only the frist time when you dropped all your roms and want to scrape all
./fullscrape.sh -u : update mode, only scrape non scraped roms
./fullscrape.sh nes fba : full rescrape of nes anf fba systems
./fullscrape.sh -u n64 psx mame : only update n64 psx and mame systems
WARNING : fba_libretro has a little bug, that will be corrected in 4.0.0 : scraping can’t be displayed. This can be manually solved if you really really are desperate …