Did your hard drive suffer a crash, clicking noises, accidentally formatted, or completed failed, then turn off your computer immediately. Any further use can endanger your data beyond anybody’s ability to recover.
Have you accidentally deleted a file or folder? It may still be possible to retrieve. If you have a mechanical HDD (Hard Disk Drive) in your computer then it may not have actually been deleted! To understand this, we need to understand how a hard-drive and a file-systems work together.
If you think of a HDD like a volume of encyclopaedia, it would be awfully difficult to find anything in an encyclopaedia without the index or appendix sections.
When you create a file on your computer it gets entered in the MFT (Master File Table) or FAT (File Allocation Table) which is much like an index in the encyclopaedia. The location of the file gets recorded here but the actual file it’s self is written in the vast storage of the rest of the drive.
When you delete a file it doesn’t actually delete the file contents, only it’s entry in the MFT/FAT. Even if you empty the recycling bin, it’s still on the HDD.
Your computer may decide to re-use this space sooner or later, at which point the file may be overwritten. This is why it is very important to recover the data as soon as possible. The longer you wait, the less likely the files can be recovered.
Occasionally there is a backup of the old MFT or FAT at the other end of the drive that you can use to re-find the data however that only lasts until you reboot your computer or disconnect an external HDD.
On the other hand, Solid State Hard Drives are very difficult to recover data from. Theoretically it is possible, but it proves far more difficult in actuality. An SSD has an automatic clean-up function known as TRIM, which helps keep them running faster and erases the empty space on the drive while your computer is idle.
The best thing you can do with an SSD if you accidentally delete a file is to turn your computer off at the power point or by removing the battery, this is the only way to stop the TRIM function from wiping your data.
We have successfully recovered hundreds of hard drives.