Hello,
Thanks guys, Mr. Fishrrman and Mr. iMacDragon.
First to iMacDragon—I thank you for your clarification about what it would be that erased all my stuff, without which I must admit to some general feelings of instability, as if the ground could hardly hold me.
For Fishrrman, allow me to answer your question, however belatedly. The folder in question is 12.14 GB, which, to me, seems rather manageable, partly so because all of the aliases and empty folders account for very little of it, GB-wise.
In any case, please accept this delayed response, for which I do apologize. Having read your subsequent instructions, I will set to work right away on the acquisition of a new external hard drive and report back upon its arrival.
With much appreciation,
Chris 🙂