Hi @Annelies_Wassens , welcome to the forum 
You may want to have a look at this solution by @lpb in a relevant post:
It would also be good to understand your situation better; whether the organisation is yours or your client’s, and what information you want to be able to download. If the organization is your client’s and you are afraid they will remove you once the collaboration is over, then you could either:
- Export the Project to CSV - but this will only include the information you see in the List/Board view (as well as metadata such as created by, modified on, dependencies etc) - it will not include information such as comments or attachments within tasks.
- Use a 3rd part integration to export the information as you wish, such as using Asana2GO + Asana: Do more with your Asana content • Asana or Bridge24 + Asana • Asana
Hope this helps! 