Infuriatingly, ChatGPT doesn't allow you to easily export your data from Business accounts (upgrades from personal accounts) like it does with personal or Enterprise accounts. I built a little tool that lets you get the data out. Might help someone out
I found myself in a similar boat (converted a personal ChatGPT sub to a Business Account shared with my partner). I ended up using Claude it write a chrome extension to just walk every chat in the side navbar and dump it to a sqlite database (when I then used for my own RAG purposes). Thanks for publishing your work.
[1] https://aperture.tailscale.com/