I'd also recommend doing a "clean install" of HS, especially if all you are using it for is music production with Logic Pro X 10.4.
Thank you, I will definately do a "clean install" when I get to the point where I am ready to install HS.
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I think you'll be fine with the Apple supplied SSD. However, your OWC SSD is suspect, and I would NOT use that as a boot drive.
Lou
Thank you, good to know that the Apple 512gb SSD will be fine as a "boot" drive for High Sierra, even though it is seven years old!
Are OWC SSDs not well regarded? Or are they just not compatible with the new file system of High Sierra? (BTW: I plan to continue using my OWC SSD as a "master" for storing my Logic Pro files)