Yes, it is possible to backup your data before making changes to your vouchers in BUSY.
To take backup of your data from BUSY, you need to follow these steps:
Step 1: Open BUSY and select Backup Data option from Company tab.
Step 2: Choose the company that you want to backup.
Step 3: Enter your username and password if required and select the location where you want to save your backup file.
Step 4: Select the financial year that you want to backup, either All F.Y. or Selected F.Y. and click on the OK button to start the backup process.