OK, plenty of room for ANY map you want/need. Unfortunately the latest Middle East map we have a meta for is v945.6176 from [Only registered and activated users can see links. Click Here To Register...] BUT you could always buy the latest & then create/share the meta with us or help out here:- [Only registered and activated users can see links. Click Here To Register...]
PS check storage space through windows via a usb lead rather that TTHome as I'm surprised if it has 4Gb and only a UK map. You can also use/see/check here [Only registered and activated users can see links. Click Here To Register...]