New program on a new disk WD mycloud home

dear, after a crash of my mycloud home i put a new disk in it, now i would like to use it again but isn’t recognised and don’t find it on my network. whitch programm do i have to copy to my disk when he is still formated in NTFS. please help me for that. i need the specific program/install program so that i can put it in my mycloud home and so use it again. best regards. ow it’s a mycloud home 1 bay