RAW drive restoration

[NHStreet]

I have an external 1TB drive that has re-formatted itself to RAW. I need to retain the data, so I don't want to re-format. How can I return the drive to a Windows recognised OS? Do you know of any reliable and preferable free software? OR can this be done in Windows 10? 

[WAWood]

@NHStreet 

This indicates that the partition boot record has become corrupted, so Windows does not what kind of partition is present.

You have two very different approaches to this:

1) Recover the old partition

2) Recover files and folders

Neither of these is built into Win10, so you will need third-party software to do this.

Download and install this utility on a working PC http://www.majorgeeks.com/news/story/recover_data_in_3_steps_with_minitool_power_data_recovery_free_...

Run the data recovery utility to see what can be retrieved from the old drive.

If that tool does not find what you need, an alternative is Recuva http://www.piriform.com/recuva

And, if that does not work well, the best tool out there is this one, but only the trial version is free http://www.file-recovery.com/ 

They also have a partition recovery tool, but that too, is not free.