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MHDR / Common faults / Deleted & lost files

Cause of loss · erased or vanished data

Deleted file recovery, Maidenhead. On a disk the file waits; on an SSD, TRIM is already at work.

Every case depends on where your file originally sat. If you deleted it off a traditional mechanical hard drive, then all you would have done is remove the directory reference for the file; the actual data will continue to reside on the cluster(s) until new data overwrites them. On the other hand, if your deleted file was stored on an SSD (solid state drive), this device will begin to erase the cell(s) containing the data automatically as soon as you delete the file, typically within seconds. Below we outline both examples, and the very first question we ask when you send us a job from Maidenhead is which of the two you have.

Only pay if we recover your data, on most jobs Diagnosis free, then a fixed quote Get a quote, then post it in from Windsor, Slough or anywhere else

Describe the fault to an engineer
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Deleted files: what each symptom is telling you.

None of these? Run the triage →
The signsThe likely causeStart here
The file is now gone and the bin is emptyYour deletion did not go through the bin: removable storage (like USB flash drives, memory cards, etc.), Shift + Delete, or files greater than the size limitDo not put anything else onto that disk
Files larger than the maximum allowed by the binFile was erased directly by Windows without going into the recycle binData normally remains in the same location
Deleted from a memory card or thumb driveNo recycle bin exists on removable media; once you hit delete, entries are immediately marked as deletedJust pull it out and leave it alone
Everything was gone following a syncOneDrive or a similar client followed a delete made somewhere else with the exact same actionLook at the provider's own web bin first
Everyday folders emptied for no reasonThe other profile and/or a delete/sync conflictTurn the power off before you look around any more
Data deleted from an SSDWindows issues TRIM, which allows the controller to clear those blocks very quickly (often within seconds)Pull the power immediately
If you wish to post it: first obtain a quote for your item via either of two methods: by telephone or by completing the online form. Then you can post the item to us using a tracked and fully insured postal service that will take it directly to our secure intake laboratory in Guildford. Alternatively, if you would rather drop it off at the Guildford laboratory personally, this is possible Monday to Friday, 9am to 5:30pm, and no appointment is needed; either way, we will cover the return postage costs. From a laptop, PC or Mac, send the drive on its own (storage soldered onto the circuit board, as in T2 and Apple silicon Macs or soldered laptop flash memory, is not taken on; if you're unsure which kind you have, please call us first). RAID drives require removal from their casing and labelling by bay number, and server disks will similarly need removing from the server and labelling by bay number. NAS disks need the same procedure if they can be removed; if not, send the entire NAS unit. An external drive must be posted whole, complete with its cable and power supply. If you wish to check the packaging before posting, an engineer will talk you through every item on the telephone. Every stage of this process is detailed on the posting page.

What a deleted file leaves behind.

On a spinning diskThe directory entry has been crossed through so the cluster(s) have been flagged as available; however, nothing will be removed from this area until something else wants to use it. Stop writing to the disk and the odds hold.
Cards, sticks and Shift+DeleteThere are none of these routes that go into the bin. However, in many cases when deleting files from an SD card, USB stick, or hard drive, the deleted content remains intact (the contents survive). The reason your files survived wasn't the bin itself but how storage devices hand back available space.
SSDs, where gone means goneWhen TRIM is called upon, the physical cleaning process begins immediately, usually in seconds. It doesn't matter if the device is labelled as Samsung, Crucial, or WD; after this point, even lab technicians will be unable to retrieve the deleted information.
Where sync is runningSync clients send deletions to other machines using the same logic used to propagate new files. Most will store deleted files in their own 'bin' for thirty days. So look here first.

What happens between arrival and return.

The most recent cases →
01

Booked in, then assessed at no cost Free

Nothing is chargeable until you say yes. Every item gets a case number of its own immediately upon receipt, an engineer determines what has failed, and you get a clear picture of which files have a real possibility of being recovered. The single quote that follows is fixed, written down and does not cost anything.

Diagnosis at no costOne fixed quote, in writingNothing signed
02

Writes stop first

Machines remain active and continue to write information without prompting. Thumbnails, browser cache, update packages etc. All of which may land in the area of your original file(s) on the disk. Therefore the disk comes out of the computer, travels to our lab on its own, and we create an image of it before anything else.

Imaging comes before all elseNothing is written to your disk
03

Tables first, carving after

If the directory tree exists then name, date, and path for each file will also exist along with the recovered data. If the directory tree did not exist then we use byte signatures for each format type to identify the location of the individual files within the image.

Names and folders preservedOtherwise carved by signature
04

Checked by opening them

File counts tell us very little, therefore every item returned is opened and checked to confirm that the items previously named by you as being of importance are present.

Each file opened and provenVerified against the files you listed
05

Opened, verified, and sent home

You don't get charged anything until you've confirmed and authorised that everything is fine after seeing the entire list of what was recovered. Any recovered items are returned via brand-new storage media and the postage costs for these are covered by us. We do not consider a project complete here until we receive confirmation that you have been able to successfully access and review every item you received back.

You approve the list firstReturned on fresh mediaThe return post is ours

What tends to show up first

  • It isn’t destroying something by deleting it; it’s overwriting it that causes problems. And an inactive Windows-based computer continues to write silently in the background and could overwrite your deleted file(s).
  • Many deletions do not even go to the bin: network shares, memory cards, files too large, Shift + Delete. None of those actions will prevent recovery when dealing with a mechanical disk.
  • TRIM can't be reversed: once an SSD deletes a block, all subsequent reads will return zeroes. This is exactly how the drive was designed to function. No tool available now or in the future can reverse this process.
  • Sync services have their own bin: Dropbox, Google Drive and OneDrive typically hold deleted items for approximately thirty days. Syncing is frequently the first item we ask about.

One keypress, two entirely different timelines: with a mechanical disk the data remains in its exact same location until overwritten. Sometimes years later. Then enter TRIM (a Seagate BarraCuda SSD, a WD Blue) and those same cells are cleared usually within minutes; often seconds. Identical action, opposite outcome. This is why we ask about the hardware first, before the filename.

From the casebook, lately.

MH · MHD-2026-6624ON RECORD ✓

Twelve months of accounts, Shift+Deleted two days from payroll

In an office setting, only one single keystroke removed one year's worth of bookkeeping off a machine, bin included. The disk was imaged that day, the file table rebuilt from that image, and the folder came back as originally named, dates included.

Full tree intact24 hours spent at the bench

Before it comes to the lab.

Do these now

  • Shut down the computer now
  • Turn off the computer instead of continuing
  • Check your view of deleted items in any sync service you use
  • Write down roughly when you first noticed the data had gone missing

Things best not done

  • Installing the recovery application on the same drive from which your data went missing
  • Saving new work for now
  • Letting one of your clean-up or optimisation tools run
  • Waiting at all with an SSD; TRIM does not wait

Deleted file recovery: the questions that arise most often.

Can deleted files genuinely be brought back?

On a mechanical disk, generally yes, unless something has been added since then. On an SSD using TRIM, probably not. The controller performs garbage collection on these blocks quickly, sometimes in just seconds. This is determined by the storage device and not what the user deletes.

What does Shift+Delete actually change?

The Recycle Bin doesn't save the deleted file. However, if you're deleting from a traditional hard disk, the deleted files stay in the exact same spot they would if you deleted normally. The bin wasn't protecting your deleted files.

When I delete from a USB stick, is there a bin to check?

None. Windows considers your deletion confirmed once you select "Yes", and there is no intermediary step. Even so, the contents generally stay in the flash memory regardless, and that is the level we read at.

What makes an SSD different?

An SSD cleans itself out. A block is identified through TRIM for deletion, and then cleaned by the controller in the background to help ensure future write operations occur at high speeds. This isn't shown to you so an SSD takes hours to complete its deletion.

Switched off, it keeps every chance it has.

Every additional power-up asks for even more of a drive that is already starting to fail. First open a case with us, and let the free diagnosis tell you how much remains.

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