Hi @Yunka, Thank you for contacting us!
We understand you may have some concerns about file deletion. We want to assure you that your files are safe. They are only permanently deleted if you manually choose to delete them.
For further details, please refer to this article: Delete and restore files
On a separate note, the 30-day period you mentioned relates to version history on the Starter plan. You can learn more about version history here: Starter plan permissions
I hope this clarifies things a bit! Thank you again for reaching out.