Hint: "max" can be used as a shortcut to specify the maximum size, or enter a percentage (e.g. "20%") to use that percentage of the maximum size. You can specify partition sizes in decimal units (like MB or GB) as well as in binary units (like GiB or TiB).
Assumer: "max" yezmer ad yettuseqdac i ufran n teɣzi tafellayt, neɣ sekcem afmiḍi (am. "20%") i useqdec n ufmiḍi-a n teɣzi tafellayt.