Please help me to erase unnecessary disks

[jillybean88]

Can someone possibly help me? I installed Catalina and I don’t like it so I Install Mojave from the App Store on a flash drive and when I went into erase Catalina using disk utility and Now I’m confused as to why I have so many? Can I erase any of these maybe this is why my computer is so slow any help is appreciated Can I erase any of these maybe this is why my computer is so slow any help is appreciated.


Internal
Apple HDD which has no available space
(then a subcategory of HDD)
container disk2 which has 13.48 GB used 486.42 Free
(then under Container disc2)
Old 10.61 GB used
Old - Data 25 KB used

Disk Images
Apple disk image media location external 2.14 GB used
(Under Apple disc image)
MacOS Base System Disk image volume macOS extended used 1.34 GB free 672.4MB

 

[Fishrrman]

Important questions:
Did you install a "bootable to the finder" copy of Mojave onto the flash drive?
Or... did you just create a bootable installer?

IF the copy of Mojave (on the flash drive) IS "bootable to the finder", you could do this:
BUT BE AWARE THIS WILL WIPE OUT ANY DATA ON THE INTERNAL DRIVE!!!!!

PRINT OUT THESE INSTRUCTIONS AND FOLLOW STEP BY STEP.

1. Boot from the USB flash drive into Mojave.
2. Download CarbonCopyCloner from here:

Download CCC | Bombich Software

www.bombich.com

CCC is FREE to download and use for 30 days, this costs you nothing
3. Open disk utility. Go to the "view" menu and choose "show all devices".
4. You should now see all the logical volumes on the internal drive. But we want to WIPE THEM OUT and start over
5. So... go to the "topmost line", that represents the physical SSD inside the MBP.
6. Click on it ONE time to select it, then choose "erase"
7. You want to erase the internal drive to APFS with GUID partition format
8. When you've got that selected, just erase it.
9. Now the internal drive is EMPTY
10. Quit disk utility and open CarbonCopyCloner
11. Accept all the defaults for now
12. In CCC's window, put your source drive (the USB flash drive) on the left
13. Put the "destination" drive (the internal drive) in the middle
14. Don't bother with the "scheduling" panel (on the right)
15. Click the "clone" button and follow through
16. If CCC asks about cloning over a recovery partition, YES, do this too!
17. Let CCC do its thing, it will take some time to copy everything over.
18. When done, quit CCC.
19. Power down the MBP and remove the flash drive
THE MOMENT OF TRUTH:
20. Press the power on button. Do you get "a good boot"? It might take a minute, because you haven't set the startup drive in system preferences yet.
21. IF YOU GET A GOOD BOOT, you're in.
22. Last thing... open system preferences, startup disk. Click the lock and enter your password, then click the internal drive to select it and close system preferences.