Hello @sergeb
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. If you're looking for a way to archive your transactions and have a smaller amount something like a year end copy might be something that would help you out. You're able to create a duplicate of your existing file and will delete any transactions that are reconciled prior to the date set. I'll leave more information down below for you to look at.https://www.quicken.com/support/when-use-year-end-copy-or-copy-fileLet me know if this helps you out. If not we can look at another way to accomplish this.
Thanks,
Quicken Francisco