Ways to Recover Numbers files
Use Time Machine Backup : You can recover Numbers file very easily because Mac OS X provide powerful inbuilt back up utility like Time machine. If you have enabled Time machine and if it has recently updated backup then you can easily solve your Numbers file recovery problems.
Note : Thelost files of Numbers still remains on your Mac drive. It is necessary to prevent lost file from being overwritten. You should must not to use the Mac system or drive from where you want a successful recovery.
If your Time machine and auto recovery fails to recover lost data then in these critical situation you can use Mac Data Recovery software, a very efficient recovery tool which works when you have no available backup. So you have still a chance to restore Numbers files after crash, or in deletion, corruption or formatting before they are overwritten by new files. Mac Data recovery is an ideal recovery software to restore lost Numbers file from any reason (application corruption, file system corruption, OS X corruption, accidental deletion or formatting). It does not manipulate or alters the data, it recovers the original data on your specified location. Its operating interface is very easy and friendly for both novice and expert user. It is a robust recovery tool for lost Numbers files after Numbers application crash on Mac.