Moving Internal HDD to External Case - MacPro

Chizzer wrote:

• Greetings!

Hopeful someone can help me with some advice regarding the following;

I have 3 internal drives (2x WD and 1x ST3) in my 2009 MacPro used daily.

• Just purchased a new M1 Ultra studio and wish to move the above HDD to external drives for the studio.

• I have several old LACIE external drives, that I would like to repurpose the drive case for the above drives.

I connected this External LACIE via usb3 to the Studio mac, and the drive mounted no problem:

https://discussions.apple.com/content/attachment/8cbb979d-056a-4e3f-a44f-e67e3b243bc5

One of the internal drives I wish to move/use as external is this one:

https://discussions.apple.com/content/attachment/6690fc5e-5f7c-4e9a-94d4-36dfbe55ab8c

Would someone be able to confirm that the above LACIE case would hold and mount the older MacPro internal HDD's to the Studio without harm?

Thanks in advance for any HDD wisdom :)

2.5" drives fit all 2.5" enclosures yes, without harm.

MacPro is a desktop. 3.5" drives fit all 3.5" enclosures, yes without harm

SATA III 6Gbps is backwards compatible with 3Gbps SATA II

Chizzer wrote:

I have 3 internal drives (2x WD and 1x ST3) in my 2009 MacPro used daily.

good point as noted above—

Apple switched from PATA to Serial ATA (SATA) starting with the 2003 Power Mac G5 tower.

Same for recent 3.5" SATA drives. Old drives like used in G4 Macs are PATA (Parallel data connection) and have much different data connectors than SATA drives and are not interchangeable.