I've copied all of the files and folders in my home directory to another computer using a USB flash drive (it took me quite a while). I then realized that I forgot to copy the configuration files. So I tried to copy them. The idea was to copy all files and folders beginning with a "." and their contents. The idea was then to be able to simply copy the contents into a new home directory to save all of my settings, my configuration, etc. , for example, if I did a fresh new installation of FC. Is this possible?

I think it's a symbolic or hard link problem. My configuration files couldn't possibly take up more than 1GB of space, could they? Or perhaps there is a 'temp' folder that stores tons of data - webpages - I don't know.

Here's what I've tried:
I was then going to substitute [a-z] with [A-Z], run the command again, and then again with [0-9]. I then thought to myself: "Why am I making life so complicated? Why not do the good old cut and paste thing?!". And I got a message saying that there wasn't enough room on my 1GB USB flash drive as well as some error messages.

Help!!

just use the -a flag to include dot files.

or even
should give you an idea what's taking up the space.

Enable dotfile in Your file manager (I use mc that has it enabled by default).
The rest is easy...