D_a_r_i_o6 years ago+110I'm a bit confused that "hard disk size" says 2.5" and 3.5". Can two 3.5" hard drives also be used?Show in original language (German)Ajeje6 years ago+121Yes, you can mount two 3.5" hard drives. However, you can also use 2.5" drives, which is why both sizes are listed in the description. global.download.synology.com/download/Document/HIG/DiskStati...Show in original language (German)Comment