Thanks you utu
I think I have "just" a Ram_Problem about transfering very large folders onto other HD (some Go).
I have found a derivative solution by 7-Zip_splitting
folders_into_several_CD_DVD_Images.
This method is a bit longer than using "swap" but faster than simply copying with previously selected files or subfolders. I have heared a bit about Zram but I am too a newbie !
Can you tell me about "stars" appearing sometimes in the list of Forum_Posts ?
Thanks you for your propositions.
knp