There is a fitting that goes to a shop vac. https://www.amazon.com/DEWALT-DWV9000-Universal-Connector/dp/B00B6K4VKS
I have it for my corded sander and it looks like it works for the DCW210 according to Amazon Q&A:
Q: Is it compatible with the cordless sander dcw210b?
A: Yes, the DWV9000 will work with the DCW210B. STANLEY BLACK+DECKER| 2 years ago
The attachment works well for me, I have it connected to a King dust extractor via a Rockler Dust Right hose fitting. It's pretty slick.
DEWALT DWV9000 Universal Connector https://www.amazon.com/dp/B00B6K4VKS?ref=ppx_pop_mob_ap_share
I bought my a few weeks ago and it’s a life saver. I use it with my DCV581H Vac to my DCW210 sander.
DeWalt gets a little wonky with their dust collection methods. For my sander I had to buy two separate adapters: one for the tool, then one that attaches to the other accessory that allows it to be used by a shop vac like Rigid. It looks like that same combo may be required for the DWS780 and I'm assuming the DWS716:
DEWALT DWV9000 Universal Connector
DEWALT DWV9190 Large Hose Adapter
As u/porttackapproach2 mentioned though, it might be cheaper and more efficient to go the route he suggested.
Dewalt makes a universal attachment that replaces the dust collector bag. I have a Festool vac and it works great.
DEWALT DWV9000 Universal Connector , Black https://www.amazon.com/dp/B00B6K4VKS/ref=cm_sw_r_apan_glt_i_K9SBQEJY5JXCHNF37W3F