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 I have various memory sticks, one as low as 128MB! Most are between 2GB and 4GB. I have a couple at 32GB and one at 64GB I think. Most are USB 2 or below. I think only one is USB3. To be honest, I rarely use them but I ve been hindered in the past with their size.  However I was thinking about making a permenant Windows Recovery Tool Disk. I have a permenant drivers memory stick for a PC that struggled from time to time. Took a good while to find the proper drivers so I saved them all to a memory stick, which is where they ll stay for Thr life of that PC.