FMAXWELL If you think that USB ports are "precious," you need a cheaper hobby or more income. The computer stores practically give away USB hubs. Every wired Apple keyboard has at least one.
If you are so concerned about losing the key (but not forgetting a password, apparently), then make a duplicate USB key. It's not like USB thumb drives are expensive. Small ones can be had for just a few dollars (I picked up some 256K drives for $3.99, threw away the drives, and kept the lanyards, which is all I bought them for).
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