USB Speed up

You mean readyboost?

It can help a bit on older systems with limited amounts of physical memory and/or slow old mechanical HDDs, thats about it, if you have an SSD and plenty of RAM it won't provide any benefits.
 
As above. Readyboost was a stop gap technology for when SSDs were still unaffordable to the masses. It's essentially USB flash caching (which is limited by usually USB2 bandwidth).
 
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