Always keep a secondary copy of critical files on a cloud service or external backup drive.

were the files on? (e.g., a USB flash drive, external hard drive, or internal PC drive) How many CHK files are you trying to recover? Share public link

If you are dealing with a specific type of storage media or error, tell me:

Many tools claim to offer "free" recovery but require a once they scan your data. To avoid this, use truly free or open-source tools, or take advantage of limited-time free trials that offer full functionality. 1. UnCHK (Best Free Dedicated Utility)