Disabling chat history will not affect your ongoing conversations and OpenAI can still use them, but you will need to delete them yourself.
How to Disable Chat History for Chatgpt | Chatgpt Tutorial
After you disable chat history, OpenAI will retain your conversations for 30 days for abuse monitoring, after which they will be permanently deleted.
Please note that chat history settings are not synced across devices and browsers. Make sure to disable your ChatGPT history on each device and browser separately.
As a pioneer of AI chatbots, ChatGPT is at the heart of every AI debate. What will the future look like, where are we headed, and should we be concerned? Citing such concerns, people are often unwilling to ask ChatGPT their most pressing questions for fear that all their data will be used to further train the bot, and every conversation they’ve had can be easily accessed by anyone with access to your account.