ミスって余計な文字入ったので訂正
file://storage/emulated/0/$if(df(m)>=0&df(m)<=9&ai(isday)=1,A1,if(df(m)>=0&df(m)<=9&ai(isday)=0,A2,
if(df(m)>=10&df(m)<=19&ai(isday)=1,B1,if(df(m)>=10&df(m)<=19&ai(isday)=0,B2,
if(df(m)>=20&df(m)<=29&ai(isday)=1,C1,if(df(m)>=20&df(m)<=29&ai(isday)=0,C2,
if(df(m)>=30&df(m)<=39&ai(isday)=1,D1,if(df(m)>=30&df(m)<=39&ai(isday)=0,D2,
if(df(m)>=40&df(m)<=49&ai(isday)=1,E1,if(df(m)>=40&df(m)<=49&ai(isday)=0,E1,
if(df(m)>=50&df(m)<=59&ai(isday)=1,F1,F2)))))))))))$/$mu(rnd, 0,2)$.jpg