OneDrive Storage Sense Data Loss: 60 GB of Videos Gone After Sync

Around 60 to 65 gigabytes of video files vanished from a OneDrive user's account after an automatic Storage Sense run and a subsequent sync operation. The folders reappeared after a OneDrive restore – the videos did not. The OneDrive recycle bin contained none of the files either. Microsoft referred the user to support without promising any recovery.

OneDrive Storage Sense data loss: what happened on 3 September?

On 3 September 2026, an affected user described a case of acute data loss in a personal OneDrive account under Windows in the official Microsoft Q&A forum. The sequence of events according to the primary report:

• Local storage space was running low, whereupon Storage Sense ran – the Windows feature that automatically frees up disk space.
• The OneDrive contents then appeared in Explorer as online-only files with a white cloud icon. That is the documented normal state of Files On-Demand: the file resides in the cloud and takes up no local space.
• The user wanted to make the "Videos" folder permanently available locally again using the "Always keep on this device" command.
• In the process, according to his account, a dialog appeared announcing permanent deletion in the cloud. Despite an attempt to cancel, roughly 60–65 GB of video files disappeared.
• An email mentioned an extensive deletion and a 30-day deadline.
• Afterwards, only the folder was visible in the OneDrive web recycle bin – without any video content. A full OneDrive restore brought back the folder structure, but not a single video file.

On 4 September, a user with the profile label "Microsoft External Staff • Moderator" replied:

"Since you have already checked the OneDrive Recycle Bin and attempted Restore your OneDrive, the next appropriate step is to contact Microsoft Support so they can review the account and determine whether any additional recovery option is available. Please understand that recovery is not guaranteed." (Xavier-D, Microsoft Learn Q&A, 4 September 2026)

The same moderator also rejected an assumption widely circulated online: the claim that Microsoft generally keeps personal OneDrive files recoverable for another 14 days via internal backups is "not part of the published consumer OneDrive recovery guidance". So anyone hoping for a silent safety net running in the background should not count on it.

Important context: no confirmed product defect

So far, this is a single publicly documented case (1 user account). Microsoft has not confirmed a cause. There is no OneDrive build number, no Windows version and no model information in the report. Whether operating error, a deletion process running in parallel, a synchronisation conflict, an account or storage state, or indeed a product defect is behind it cannot be determined from the available sources.

What is certain: a logical data loss during cloud synchronisation has been specifically reported and documented – and this is exactly the pattern we know from day-to-day data recovery work.

Who and which systems are affected?

The affected combination is one that is active on millions of Windows machines:

• Microsoft OneDrive for home (personal Microsoft account) under Windows
• OneDrive Files On-Demand – the feature that downloads files only on demand
• Windows Storage Sense (storage optimisation) – according to Microsoft documentation, available in the form described from Windows 10 version 1809 onwards

Important: the official documentation explicitly describes the intended behaviour differently from the course of events described. Microsoft writes about Storage Sense:

"Windows Storage Sense is a silent assistant that works with OneDrive to automatically free up space by making locally available files that you aren't using anymore online-only again. Online-only files stay safe in OneDrive and are visible on your device." (Microsoft Support, "Use OneDrive and Storage Sense in Windows 10 to manage disk space")

And about "Always keep on this device":

"Only files that you mark as 'Always keep on this device' … download to your device … and they're always there for you even when you're offline." (Microsoft Support, "Save disk space with OneDrive Files On-Demand for Windows")

Files with this marking are even exempt from Storage Sense. Deletion is not documented as an effect of this command. The reported incident therefore deviates from the described intended behaviour.

One technical point that misleads many people: if an online-only file is deleted in the OneDrive folder, that constitutes a synchronised deletion. Microsoft describes that the file is thereby removed from OneDrive, from all devices and online. Such files do not appear in the local Windows Recycle Bin. An empty Windows Recycle Bin is therefore by no means an all-clear in this scenario.

How to check whether you are affected by this OneDrive data loss

These steps are harmless – they change nothing about your data:

1. Don't just look in Explorer. Sign in at OneDrive.com with the affected Microsoft account and use "Search everything". Search for file names, alternative spellings, descriptions, tags, date or location. Microsoft describes the web view as the best starting point because all devices sync there.
2. Search the OneDrive web recycle bin specifically for individual files – not just for the folder. With personal accounts, recycle bin items are automatically deleted 30 days after being moved there.
3. Unlock Personal Vault if you use it. Otherwise its contents do not appear in search results and possibly not in the recycle bin either.
4. Check that you are in the right account. If you have several Microsoft accounts (personal, work, school), search the other one as well.
5. Check the activity history if you have a Microsoft 365 subscription. "Restore your OneDrive" can roll back file and folder actions from the last 30 days – the activity history shows when what happened.
6. Look for independent copies: Windows file search, local Recycle Bin, external hard drives, USB sticks, camera memory cards, earlier exports, other devices in the family.
7. Secure the evidence: screenshots of the web recycle bin and the search, the deletion email including its timestamp, the OneDrive activity history as well as exact file names, sizes and the approximate time of disappearance. These are precisely the details the Microsoft moderator recommends for a support escalation.

What you should do now – immediate measures without risk

With an ongoing cloud data loss, every hour counts, because the recycle bin's 30-day clock is running. These measures cannot make anything worse:

1. No further deletions, moves or renames in the affected OneDrive folder. Every action on an online-only file takes immediate effect on all devices and on the cloud data.
2. Do not empty the OneDrive web recycle bin. Only restore individual files or folders there that you can clearly identify – and only if you are certain what you are clicking on.
3. Pause synchronisation on other devices as a precaution if you see further deletions or sync changes there. Pausing means: pause, not uninstall, and delete nothing.
4. Use the computer on which the files were once stored locally as little as possible. No downloads, no installations, no updates on this drive. If there are still remnants of a previously locally available copy there, they will be overwritten by every write operation.
5. Contact Microsoft Support – with the account address, the timestamp, the deletion email, the state of the recycle bin and the result of the OneDrive restore.
6. Have the case assessed professionally in parallel. The sooner someone with experience in cloud sync data loss takes a look, the greater the room for manoeuvre that remains.

What you must not do under any circumstances

This section is the most important one. With data loss caused by OneDrive synchronisation, it is precisely the well-meant rescue attempts that most often destroy the last remaining chance.

• Do not empty the OneDrive recycle bin and do not permanently delete anything from it. Microsoft puts it unambiguously: "If a file has been permanently deleted from your OneDrive Recycle Bin, it can never be recovered." That is the point at which the official recovery route definitively ends.
• Do not wait. With personal OneDrive accounts, the system automatically deletes recycle bin items after 30 days. Anyone who first "waits to see whether it sorts itself out" loses the regular recovery option through the mere passage of time.
• Do not "test" with file operations. Do not delete any further online-only files to see "what happens then". According to Microsoft, such deletions are removed in sync from OneDrive, from all devices and online.
• Do not start repeated, unplanned full restores of OneDrive. A restore moves content created after the selected restore point into the OneDrive recycle bin. Anyone who blindly tries out different points in time several times makes the account state confusing and risks pushing newer data into the recycle bin as well – which in turn is cleared out after 30 days.
• Do not install recovery software onto the possibly affected drive or let it write there. If there are any local remnants of the video files at all, they will be irretrievably overwritten by the installation and by saving the results to the same storage medium.
• Do not expect local recovery software to bring back pure cloud files. Online-only files exist locally only as placeholders. They are not in the local Recycle Bin, and a scan of the hard drive turns up nothing in the case of pure cloud files – what matters is the cloud data.
• Do not start any "clean-up" or optimisation tools. Running Storage Sense again, Disk Cleanup, registry cleaners or defragmentation on an SSD are exactly the processes that overwrite free areas with new data.

In our daily work it is almost always the same story: it is not the original error that makes data unrecoverable, but the series of attempts that follow – the third restore, the quick scan with a free tool, emptying the recycle bin "to make space". What up to that point was an analysable case is often nothing more than a field of debris afterwards.

Why this case belongs in professional hands – and how RESQ helps in concrete terms

Data loss following cloud synchronisation is a logical damage: the hardware is fine, the structure of the data is not. That is precisely what makes it treacherous. There is no clicking drive, no warning signal – something is simply missing, and every further action on the system can worsen the situation without anyone noticing.

What professional data recovery does differently in such a situation than the affected user at home:

• Work on a copy, never on the original. Before anything is analysed, a forensic image of the affected storage medium is created. All further steps run on this copy. The original state remains untouched – in case a later attempt requires a different approach.
• Systematic analysis instead of trial and error. The first thing to clarify is where the data was last physically located: only in the cloud, or was there a period during which it was available locally? This question determines the entire further course – and it cannot be answered by clicking around.
• Evaluation of file system remnants. If a previous local copy existed, metadata and file fragments may still be present on the storage medium – but only for as long as nothing has been written over them. Large video files are a chapter of their own here: they are often fragmented and require targeted reconstruction rather than a simple standard scan.
• Experience with exactly this failure pattern. Files On-Demand, Storage Sense, synchronised deletions, placeholder files: we know the difference between a file that is merely "online-only" and one that is actually gone – and we know which actions on the client additionally endanger the cloud side.
• Honest boundaries. If data existed exclusively on the cloud side and was permanently removed there, we say so clearly. We do not sell hope that does not hold up technically.

The process at RESQ

1. Free initial assessment. You describe the case to us: what you did, what has disappeared, which device and which account are affected, when it happened. We tell you whether and how there is an approach. You will find the right route via the free quote for your data recovery.
2. Analysis. The storage medium is secured and evaluated – on a copy, not on the original.
3. An honest statement about the prospects and a binding quote. You find out what is technically possible, what it costs and what can realistically be expected – before you decide.
4. Your decision. Only once you agree is the recovery carried out. If you would like to start straight away, you can create an order via your customer account.

You can read about how we work and which damage patterns we cover in the overview of data recovery at RESQ. If the data was stored on a classic hard drive before the incident, hard drive data recovery is the right starting point; for network storage, data recovery for RAID and NAS applies.

The core message is simple: anyone who wants to be sure their data is not permanently lost through DIY attempts should have the case assessed instead of continuing to experiment. No one can guarantee a successful recovery – Microsoft explicitly does not do so in this case either. But the chance that still remains should not be destroyed by your own hand.

What can be learned from this case in terms of prevention?

The incident reveals a widespread misconception: cloud synchronisation is not a backup. A sync service mirrors changes – including deletions. If something disappears on one side, it disappears everywhere. That is exactly what happened here, and exactly why the recycle bin was not enough either.

A real backup is an independent copy on a separate medium that does not sync along permanently – for example an external hard drive that is disconnected after the backup. Anyone who regularly produces large media files should maintain at least a second, non-synchronised copy. Our backup assistant gives you a guide to what a viable backup concept looks like.

Conclusion: act now, don't experiment

In summary: a OneDrive user lost around 60–65 GB of video files after a Storage Sense run and an attempt to make the "Videos" folder permanently available locally. Folder structure restored, files gone, recycle bin empty, full restore unsuccessful. Microsoft refers the user to support and makes it clear: "recovery is not guaranteed". As of the research date of 5 September 2026, there is no published fix, no update and no workaround for this specific sequence of events – the official Microsoft overview of current OneDrive problems contained no corresponding entry.

If files are missing on your system after a sync or clean-up operation, the rule is: do not empty the recycle bin, do not blindly try out further restores, do not write any software to the affected drive, delete nothing. The 30-day clock starts running from the moment of disappearance – hesitating really does cost you the chance here.

Better to have your case assessed once too early than once too late: request your free initial assessment with a quote now. You will receive an honest assessment of the prospects and only then decide whether we should take action.