You may be moving from an HD to an SSD out of necessity (your hard drive is dying or has died) or to enjoy one of the many benefits (namely they're a lot faster than hard drives).
If your computer can still boot from your old hard drive we can likely clone it. All of your files, settings and programs migrate when you clone. Cloning is a lot easier than getting a computer back to the way you had it. It's 100% accurate.
We can clone the drive from your old system to your new computer. It takes a lot of the pain out of upgrading. This can be done on PCs (Windows 10 or newer) or Macs. On Macs over 7 years old you can no longer use the latest versions of macOS. And you normally can't downgrade a Mac to an older version. In these cases we use Time Machine to migrate files, programs and settings from an older Mac to the new.
A hard drive failing can have a great impact on the speed of your computer because it needs to read multiple times to get a successful read. Another thing that significantly slows down a computer is malware. If after scanning your computer is still running slow you probably have a bad hard drive. We've seen other things slow down a computer but malware and a failing hard drive are the most common.
We keep a variety of sizes of SSDs on hand to provide quick turnaround. Or you're welcome to provide your own. Because of the many benefits (speed, weight, durability) we exclusively use SSDs as the OS drive.
SSDs are great but they do tend to fail hard. It's recommended you make continuous backups. You need a dedicated external drive to take advantage of either of these methods.