All my files have been replaced by a found.000 "empty folder". How can I recover my data?

Five minutes ago I was browsing my external hard drive. Now, I have only one folder named "found.000" that I cannot read, open nor browse. I have important work on my external hard drive. Is there a way to retrieve my data?

I was trying to use TestDisk but I do not know how to use it very well and I don't know the type of partition there is on my external hard drive (Toshiba Stor.E Canvio - 500Gb) this is what the log says :

Disk /dev/rdisk2 - 500 GB / 465 GiB - 976773168 sectors (RO)                    
Current partition structure:                                                    
     Partition                  Start        End    Size in sectors             

Warning: number of heads/cylinder mismatches 255 (NTFS) != 1 (HD)               
Warning: number of sectors per track mismatches 63 (NTFS) != 1 (HD)             
 1 P HPFS - NTFS                 2048  976771119  976769072 [TOSHIBA EXT]       

Warning: Bad starting sector (CHS and LBA don't match)                          
No partition is bootable                                                        

0 D FAT32 715093261 1896786745 1181693485 
FAT32 715093261 1896786745 1181693485 
check_FAT: can't read FAT boot sector 
Invalid FAT boot sector 
0 D FAT16 LBA 2125262773 5909813675 3784550903 
FAT16 LBA 2125262773 5909813675 3784550903 
check_FAT: can't read FAT boot sector 
Invalid FAT boot sector 
0 D FAT32 LBA 1365415759 2816414404 1450998646 
FAT32 LBA 1365415759 2816414404 1450998646 
check_FAT: can't read FAT boot sector 
Invalid FAT boot sector 
0 D FAT12 2873871126 2963834879 89963754 
FAT12 2873871126 2963834879 89963754 

I am using a macbook pro mid-2009, with Snow Leopard (Mac OX 10.6.8). I tried to retrieve my data with MacKeeper the disk is not readable. It is an NTFS disk.

Here are some screenshots from Testdisk.

Thank you in advance.

Solution 1:

I have been able to recover all my data with the folder structure with Minitool Data Recovery. I haven't tried to fix the geometry of the drive with TestDisk yet though.