format the new ssd when still outside the mac (you need an cable to usb). Forget all software that came on the disk: all has to go with the format.
Now use a clone app on the mac, like CarbonCopyCloner, to make a clone of your actual disk with everything on it to the still external disk.
When that is ready, shutdown the mac.
Restart while ...
Disk Utility looks like it's pre-Yosemite [skeuomorphic dots top left] which will have no idea what APFS is.
Try booting to Internet Recovery using Cmd ⌘ Opt ⌥ R & you should get the chance to install the latest OS the machine can run, rather than the one it came with.
You should also get a Disk Utility that understands APFS.
That can happen with non-Apple SSD-sticks, even Apple ones from the wrong year's model can cause those exact symptoms. You can't take one from a 2015 MBP 15 and attempt to use it in a 2013 model, although it will work in the 2014.
You'l just have to find the right one for your exact model; Transcend's JetDrive line of SSD-sticks for Macs are well delineated ...
Probably a format issue. There should be nothing left that was on the disk when new!
Format the drive completely in Mac OS Extended (journaled), completely, everything!
Then partition it in the three partitions.
Then install Mojave in one partition (the format will be changed only in that partition).
There is a very similar problem here, and a solution. SSD in a MacBook Pro (mid 2012, 13"), Finder symbol with question mark. You need a new internal SATA disk connector cable to work with the new SSD. I have encountered the same problem with my MBP mid-2012 and a new Samsung 860 EVO SSA.
I see a drops of 17% (write) and 25% (read) when using encrypted vs non encrypted (One APFS container with APFS Volumes).
It seems that the 40% drop you experience is high in comparison, but it is hard to tell with so little data.
APFS Volume type | Write (MB/s) | Read (MB/s)
apfs | 912 | 919
apfs encrypted | 756 | 688
Using case-sensitive or not made ...
Per your request from the below quoted text,
elaborating on this step: Use more than one EFI partition. A drive can
have more than one EFI partition. Additional EFI partitions do not
have to reside at the beginning of the drive.
here is some info (I will make edits shortly when I have more time):
An EFI partition (sometimes referred to as an ESP ...
I think I may be able to help you triple boot, although I haven't tried triple booting yet. I do know how to install Windows on a separate SSD, and I'm pretty sure you can just install Linux by partitioning the SSD. Here are the steps:
Step 1: First, you have to install both Windows 10 and Ubuntu ISO files. Ubuntu from here: Ubuntu ISO File, and Windows 10 ...
According to the information on everymac.com, the Early 2015 MacBook Air has a PCIe SSD while the Early 2013 MacBook Pro uses an SSD with a SATA interface. The everymac.com page implies that the Pro's SSD can be replaced with a 2.5in drive up to 7 mm thick.
This ought to mean that you could either look for a PCIe to SATA adapter to use the drive from the ...
Have you tried reverting to the original macOS that was shipped with this system? If you can reproduce the same behavior with Mavericks/Yosemite then you could very well confirm that this behavior is rooted in an SSD failure vs file system issue.
This blog post lists a number of issues as to why Mojave cannot find your hard disk, I would perform a ...