Upgraded iMac 2013 late to SSD

[Eduardot]

Ok Guys:

1. connected the SSD to a sabrent USB3 UASP SATA III 2.5 " enclosure.
2. the SSD is a Samsung EVO 860 1 TB.
3. Previously formatted the disk and then used Carbon Copy Cloner to make the HDD clone.
4. Afterwards of 4 hours that it took to make the copy.
5. In settings i selected the SSD to be the boot drive, and then restarted the iMac.
6. R/W speeds are in the 400- 430 mb/s.
7. And still we have to try to put the SSD inside the iMac.
8. I post pictures.
9. The boot process did take a little longer than 1.5 minutes. All is working fine. Definitely faster.

 

[Fishrrman]

My suggestion:

UNLESS you are SURE that you can open the iMac and do the job without problems, just leave things "as they are right now". It's a matter of skill and confidence. If you can do it, go ahead. But, realize that what you're seeing right now, speed-wise, is pretty close to what you'll see if you mount the drive internally.

RE bootup times -- did you go to the startup disk pref pane, and set the external SSD to be the boot drive?

 

[Eduardot]

My suggestion:

UNLESS you are SURE that you can open the iMac and do the job without problems, just leave things "as they are right now". It's a matter of skill and confidence. If you can do it, go ahead. But, realize that what you're seeing right now, speed-wise, is pretty close to what you'll see if you mount the drive internally.

I've read in the forums that TRIM cannot be enabled to an USB 3 connected SATA drive. It can only be run if the SSD is connected directly to the motherboard. Any comments on that?

RE bootup times -- did you go to the startup disk pref pane, and set the external SSD to be the boot drive?

Yes the SSD is set to be the boot drive.

 

[Eduardot]

Took the plunge and upgraded the SSD to inside the iMAc. Enabled Trim, and my read and write speeds are from 80 to 490-520 MB/s. Boot is down from 2minutes to 20 seconds. And the programs load a lot faster. The process is a little difficult, but I used to build my own systems when I was in Windows, so I was not that challenged.
I want to thank ALL of YOU that participated and advised me on the process and details.
I post some pictures.