Hello, MacBook Pro (Early 2011) with OS High Siera I have so many small external hard drives and CD/DVDs (!), which are taking up my storage space, so I am trying to move everything into my new 10TB external G-Technology drive. (I know it's risky to move them into one drive, but most important ones are already backed up.) I was searching about the best & easiest way to do this, and some sites recommend to do "restore" in Disk Utility. So I tried to do that, but it tells me everything in the new drive will be erased. I guess it's like replacing the content of them. But I have many drives, so I need to keep the files in the source drive while transferring the files from the small drives. What is the best way to do this? I've tried to copy and paste the whole drive before but it crushed after a few hours so I am looking for the safest/easiest way. Thanks in advance!