The USB stick is an optional extra, it basically gives the machine the "isend" option (scan to email etc)
If the machine is jamming but you find no paper it sounds like the machine is not picking up the paper.
Remove the paper cassette & open the right hand door. Then reach in & you can unclip the 3 feed roller (pick, feed & separation) give the all a clean, anything will do, even WD40 is good! just ensure they are dry before you fit them back.
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