Even though storage plays the biggest role in boot times, it's hardly a factor these days because SSDs are the standard for primary storage and they're superfast. Yet your system may still boot slowly, and the cause may not be the storage drive but other factors like hardware initialization, the Windows bootloader, the BIOS/UEFI, and more.
MakeUseOf
Windows boots slower than it should, and I found the fixes that actually save time
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