Most commercial tools use a similar model as well. They perform a complimentary scan to locate your files, preview them and ask for money when it comes time to write them out. This is not deceitful; however, you should know what to expect beforehand.
Virtually all commercial recovery software operates similarly, with the paywall arriving at the point you are most invested. A small handful of products actually offer no charge, yet each has its own restrictions.
All of these tools (Recuva, Disk Drill, EaseUS, Stellar etc.) do a good job with the initial free scan. The tool really does read the drive, and then does its best to rebuild as much as it can from that data into something like thumbnail images or a file tree. Where they differ in terms of cost is where you get charged. Some cap how much you can recover for free, typically 500 MB or 1 GB. This is usually enough space to retrieve your documents but will never be enough for photos or videos. Others simply won’t let you save anything unless you have purchased their software.
A major advantage in using a free scan is the ability to make decisions as opposed to recovering your lost files. When you run a scan on your computer and the scan locates your files and accurately shows you a preview of what they contain, then you know that all your files have been preserved and now it comes down to cost. On the other hand, when a scan does not locate any of your files, or if the previews are corrupted, then that tells you something that can never be fixed by purchasing a licence.
PhotoRec is completely free, with no limit on storage (it works by finding files based upon signatures). However, while it is very good at what it does, it has an extremely user-unfriendly nature: you have to run it as a command line tool which will give you your deleted files but they will be named “fileX” etc. (no name or folder information). TestDisk, also from the same people who created PhotoRec, is able to repair partition tables as well as recover files from certain file systems; there is always a risk when using this type of software, since it writes to the drive. In fact, if used incorrectly, you could end up losing even more data than was originally lost. Recuva has no volume limits on its free version and presents itself as a normal application; however, like most things made available free of charge, it is limited by being only compatible with Windows operating systems and has seen little improvement over time.
These three will get you through most situations in which using software would be the best solution, as long as you use them read-only and only on a healthy drive.
All of the above tools work by intensely scanning your drive(s) over time (hours). This is harmless on a good drive but is extremely bad news if your disk’s heads are failing, or if you have “bad” sectors that are spreading out across the drive. A recovery program will make the problem worse by dragging an already weakened head around each and every sector; thus disks can easily fail during a recovery program run that should otherwise fix them.
Before choosing software for recovery of your data, you must first determine if there is any physical damage to the hard drive itself. So if it clicks or ticks when in use, makes unusual grinding noises, gets too hot, or disappears and then re-appears, do not risk trying to rescue your data by running software. Stop now!
If the hard drive is producing loud sounds while in operation, holds the only copy of your most important data (irreplaceable), or has been run through a scan that failed to locate the file(s) you are looking for, then all further attempts will have very little expected value. We start our recovery process with an imaging of the entire hard drive read only. Every subsequent attempt will be against a complete image of the original. This is the key difference between our approach and running recovery software yourself.
Following a complimentary 48-hour diagnostic and a quotation given in writing (in most cases you only pay if we recover your data), a single drive is priced from £300 +VAT. We will also inform you when a piece of software could have completed the task in question successfully.
Generally speaking scanning costs nothing but recovering your data often does. Many tools allow you to scan and preview at no cost and then limit how much they can recover based upon volume or require you to purchase a licence so that you may be able to write recovered items out. PhotoRec allows unlimited free file recovery using signatures; TestDisk provides unlimited free partition repair capabilities; Recuva’s free version is uncapped and offers an easy-to-use interface for Windows users who wish to utilise this capability.
PhotoRec is capable of recovering files by signature with no limits. TestDisk is capable of repairing damaged partitions. If you prefer an easy-to-use interface while running on Windows, use Recuva. However, because there is no limit on what PhotoRec can recover, it simply does not assign names or folder structures to its recovered files, thereby allowing it to operate unencumbered.
No. Reading a disk as much as scanning does in order to find your lost data will be a major contributor to its failure if it contains defective heads, or is spreading bad sectors. If you notice clicking, grinding, overheating or losing the signal at all, stop reading this drive. It needs to be imaged first.
On a separate drive (one other than the one you’re recovering) and also put your recovered files on a different drive. Installing back into the same damaged drive may overwrite some of the data you’ve been working so hard to preserve, which is the most frequent self-imposed loss we see.
Anytime there’s physical failure, the only copy of an item that is irreplaceable, or a previous scan has already been attempted but was unsuccessful. We image the failing disk read-only in our lab; therefore, each additional attempt is made to a duplicate instead of the original, which is something software can’t accomplish.