You can’t copy “Aperture Library” because it has the same name as another item on the destination volume, and that volume doesn’t distinguish between upper- and lowercase letters in filenames.

No I did not have a file/folder on the new drive that was the same or had a similar name. The drive that i tried to copy to was a brand new drive that I purchased from Apple. It was fresh and blank. I made three attempts. I have now given up. I suspect that this is Aperture issue rather than a hard drive issue. This is the price one pays for being loyal to Apple. Much frustration.

I opened Disk Utility as you instructed.

The drive that contains my aperture library and from which that I am trying to copying from is "Case-sensitive, Journaled".

The new drive that I am attempting to copy my aperture library to is "Journaled" only.

Do I take this to mean that I have to re-format my new drive to "Case-sensitive, Journaled"?

Ty,

Michael

I do not know why it is case sensitive. I did not format it that way.

I have not had any problems using aperture on this drive. In fact, I first used this drive on my MacBook Pro before I purchased a Mac Mini in the fall. I have used this drive on both computers without any issues - or at least none that I was aware of. All of my photos are shot in raw and saved as Tiff files after post production - which is why I save and store them on the portable drive.

Prior to our exchanges, I also tried backing my library on to the new drive via aperture vault. I am not if this will work. It is still saving.

To be honest, I do not know. How would I check this?

Ty!