what is the easiest way to upload a dvd to my pc, then burn it later?
To start with too little information.
If you mean a commercial movie DVD then AnyDVD with CloneDVD2 or DVDFab to rip ,read , or upload as you put it.
Once you get the DVD folders on the hardrive ImgBurn is prefered by many for the write or burn to DVD disc.
AnyDVD & CloneDVD2 are paid software DVDFab is too but there is a free after trial version . It has limitations but will rip encrypted commercial movie DVD’s to DVD9 size. There is a longer time till it is updated so the free version won’t do the latest movies (sometimes) for about 60 days after the paid version is updated.
DVDFab free doesn’t burn either but ImgBurn is freeware & will. If you are going to burn a DVD9 rip to single layer you need to compress it. Many use DVDShrink for this .
I say DVDFab, it has everything, you don’t have to go any further!