I used a Hiren's Boot USB (the new PE version) with etcher portable and the image unzipped. You then use the same process as others have described, but make sure etcher is in "dangerous" mode (or whatever it's called) so it can write to large disks.
ça servira peux être à d'autres, après avoir écrit l'img sur le ssd, allez dans la partition boot et remplacer /dev/mm...02 par /dev/sda2 dans cmdline.txt !
Recalbox remix is not an official recalbox team release, but a fork. Some of the work was included in the official recalbox, but not everything. As its author decided to fork, it's up to him to offer support, so please get in touch with him.