But these drives are often on the smaller side, usually between 256GB and 1TB. Upgrading your internal SSD is a smart way to add more space, but that doesn't mean the old one has to go to waste.

SATA SSDs use the same 6 Gbps interface as a hard drive, which means sequential read speed goes up to around 500-550 MB/s. NVMe SSDs use PCIe lanes – and that's where the real speed difference ...