As I used the NAS for archiving purposes, I mainly store two type of files inside the NAS, the CR2 (EOS 7D Raw) and XMP files (from lightroom) plus a few other mis files like psd files. Photorec looks to be able to recover files as shown in the screenshot:

But when I copy out one CR2 files to test, Lightroom & Photoshop are not able to open them. Even when I preview them (I have installed the windows program to preview RAW files), I get a black image.
Yet I have no issues with opening the XMP files
Is there something I am doing wrongly? Please advice.
Thanks in advance.