USB-C cables look more or less the same, but they don't all work the same way. That disconnect is the source of one of the standard's biggest frustrations.

Ok so im not to good with cable line/type and all that stuff. I am looking to get a new modem I know how to do that my problem is I will need some more cable line and an a adapter, but I do not know ...

It's easy to justify keeping some old cables around, but a few have become so obsolete that they're probably doing nothing ...