Recently erased my iPhone to factory because of specially big "other" storage and short after restoring I connected my iPhone (IOS 13.5.1) to My computer (Mac OS Catalina 10.15.5). I noticed my cell phone was filled so inmediately I ran out of storage (not that any video/music files were copied, but the "other" storage grew up). Music had dissapointed me, I miss old iTunes
