I have old VSD files but don’t currently have Visio. Is there any good free software to open/edit them? Can they be opened/edited with any Adobe apps? Apart from Visio what is good for creating diagrams?
I have used https://www.diagrams.net/ previously. It not bad for a freebie, and you can just do it in the browser.
or LibreOffice... which is free! https://www.libreoffice.org/ How true it is to the original docs I really don't know, as I've never used Visio. Good luck, Cando