Swapping boot file

Sig13524

Reputable
Dec 1, 2015
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4,510
My buddy let me borrow an SSD of his until I could afford my own (he only had a 256 to spare) and I bought a 128 just for boot purpose. The only files on the SSD are the boot files/drivers for devices that my computer already runs.

Can I just copy the files from the 256GB to the 128GB and still be able to boot? or will I have to do a fresh install?