How to fix slow computers without a technician. If your computer is slow, there are a few things you can do to try to fix the problem yourself. You can buy a new computer, clean up your existing computer, or call a professional.
Thunderbolt versus USB 3.0 and 2.0 backup drives.USB 3.0 is a newer technology that is faster than USB 2.0. However, the practical speed is only marginally better. The speed is limited by the physical hard drive. Thunderbolt is even faster than USB 3.0, but it is more expensive.