senseless wrote:
"It’s a 1 terabyte fusion drive, but just 1/4 full. Is that still worth replacing with an SSD?"
OK, let's do some figurin'.
1/4 of "1tb" is roughly 250gb, right?
The internal SSD portion of the fusion drive is 128gb on that model, I believe (others will correct me if I'm wrong).
So... what's happening is... the SSD is probably close to "filled up".
What this means in practical terms is that the computer has to "go to" the HDD portion of the fusion drive for storage, and it also means that there's probably a lot of "swapping out" of data between the SSD portion and the HDD portion.
End result = slow.
I see two easy ways to correct this.
Either one will result in a MUCH FASTER computer.
Method 1:
Buy an external USB3 SSD (such as the Samsung t5), and set that up to be the boot drive, with the following on it:
- OS
- Apps
- Accounts*
* -- leave "large libraries" of movies, music and pictures on the internal fusion drive (they don't need the speed of the SSD)
Method 2:
- Create a bootable cloned backup of the fusion drive using either CarbonCopyCloner or SuperDuper (both are FREE to use for 30 days)
- Boot from the clone
- Use the terminal to DE-fuse the fusion drive (split it apart into two "standalone" drives)
- Set the SSD up to become the boot drive, but again -- KEEP IT LEAN AND CLEAN with only the OS, apps, and "basic" accounts
- Put your large libraries of movies, music and pics onto the internal HDD.
The SSD and HDD will now function as two "independent" drives inside the iMac.
Because the fusion concept will no longer be in effect, the internal SSD will ALWAYS "run at full speed" -- probably faster than any external drive you can plug in.
Others will say "open it and replace the HDD with an SSD".
Do ya feel lucky, kid?
Big danger of breaking something inside.
My ways above (both of 'em) are fast, easy, and most importantly -- least invasive.