Hi Tanaka, 

Welcome to Box Community and glad to help! 

Please note that this recovery grace period does not apply to Free accounts. We are unable to support file recovery for our Free Individual plan. 

https://support.box.com/hc/en-us/articles/360044196093-Managing-Trash

Hope it helps! 

Even if I upgrade my account to paid? Would you be able to recover my file then?