My Outlook PST file seems to have disappeared after moving some folders and restarting my computer, and now I can’t access years of emails, contacts, and saved attachments. I really need help figuring out how to find or recover the missing PST file because it has important personal and work-related data I can’t afford to lose.
I ran into this same Outlook mess once, and yeah, seeing “file cannot be found” makes your stomach drop fast. Mine happened right after I cleaned out Downloads and Documents and removed the one file I should’ve left alone.
First thing, stop using the PC more than needed. When Windows deletes a file, it usually marks the space as free instead of erasing the data right away. If you keep browsing, installing stuff, or moving files around, your old PST has a higher chance of getting overwritten. I’d pause everything until you check recovery options.
What I’d do first
Start with the easy stuff before you get into recovery tools.
1. Check the usual places
Open the Recycle Bin and look there first. If you pressed Delete, the PST might still be sitting in there. If you used Shift+Delete, it skipped the bin.
Also check any cloud sync service tied to your Documents folder. OneDrive and Dropbox both keep deleted items for a while. On Dropbox, I found old files in the deleted files area more than once. Version history helps too if the file got replaced instead of removed.
2. Try Windows previous versions
This one is hit or miss, but it takes a minute so I’d still try it. Go to the folder where the PST used to be, often:
C:\Users\YourName\Documents\Outlook Files
Right-click the folder, pick “Restore previous versions.” If Windows has shadow copies or restore points for it, you might see an older folder snapshot. Open it and copy the PST out somewhere safe.
If the file was fully deleted
This is where I stopped guessing and used recovery software.
3. Scan the drive for the missing PST
The most practical route is a recovery app. I’ve seen people get decent results with Disk Drill, especially for Outlook data files.
The steps are pretty plain:
Install it on another drive if you have one. A USB stick works too. You want to avoid writing more data onto the same drive where the PST was deleted.
Run a scan on your main drive, usually C:.
When results show up, search for .pst files or filter by file type.
The file size matters a lot here. Outlook often makes a new empty PST when it panics. Those are tiny, often around 265 KB or so. Your real file, the one with mail and folders, is usually much larger. Mine was over 1 GB. So don’t grab the smallest match and call it done.
If you find the large PST, recover it to the Desktop or an external drive first. I would not put it back in the original folder yet.
If Outlook already made a new empty file
This part confuses people because Outlook tries to “help” and ends up hiding the real problem. When it loses the old PST, it often creates a fresh blank data file with a name like “My Outlook Data File.” Then Outlook opens with empty folders and it looks like everything is gone.
If you recover your old PST, don’t hit Send/Receive and hope for the best. Open it directly:
File > Open & Export > Open Outlook Data File
Pick the recovered PST from your Desktop. If the recovery worked, your old folders should show up in the left pane. After you confirm the mail is there, go into Account Settings and set the recovered file as the default data file again.
One thing people miss with IMAP
If your account was IMAP, like Gmail or Comcast, your inbox mail might still be on the server. Outlook will often rebuild an .ost file after you add the account again, and it pulls the mail back down.
But local archives, custom folders, and stuff you stored only in the PST are different. Those do not come back from the mail server. Same with some local-only rules and old archive structures. So if your setup used local storage, the deleted PST still matters a lot.
After you get through this
If you recover it, I’d move the PST somewhere included in backups, or export a copy to an external drive every week or so. Outlook gives you almost no guardrails here. One bad delete and years of mail are gone from view in a second. I learned that the dumb way.
If your scan finds a big PST, your odds are decent. Small file, bad sign. Large file, worth some hope.
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If the PST did not get deleted, it often got moved, renamed, or detached from your Outlook profile.
I’d check Outlook first, not Windows. Small disagree with @mikeappsreviewer there. A lot of “missing PST” cases are profile issues, not raw deletion.
Do this.
Open Control Panel, then Mail, then Data Files.
Look for any PST paths listed there.
If you see one with a broken path, note the old location.
If you see multiple PSTs, one of them might be your old archive.
Then search your whole drive with Windows search or File Explorer search.
Use:
*.pst
Sort by Size.
A real mailbox PST is often hundreds of MB or several GB. An empty replacement file is tiny.
Also check these folders:
C:\Users%username%\Documents\Outlook Files
C:\Users%username%\AppData\Local\Microsoft\Outlook
If you find the file, do not double-click it first. Open Outlook, File, Open & Export, Open Outlook Data File. That avoids more profile mess.
If Outlook opens the file but shows errors, run ScanPST.exe. Microsoft includes it with Office. It repairs index damage in many PST files. Search your PC for scanpst.exe.
If the search finds nothing, then use Disk Drill and scan the drive for deleted PST files. Recover to another drive, not C:. That part from @mikeappsreviewer is solid.
Also worth reading this Outlook PST recovery thread for extra cases people hit:
Outlook PST recovery tips from Reddit users
One more thing people miss. If you moved folders inside Outlook, that should not delete the PST. If you moved folders in File Explorer while Outlook was closed, Outlook often loses the path and builds a fresh blank file on restart. Annoyng, but fixable if the old PST still exists.
I’d add one angle neither @mikeappsreviewer nor @cacadordeestrelas really leaned on enough: check whether the PST is still on the disk but Outlook is pointing at the wrong profile after the restart.
Outlook profiles get weird fast. If Windows or Office decided to make a temporary profile, your mail can look “gone” when the old data file is still sitting there untouched. So before doing anything heavy, open Control Panel > Mail > Show Profiles and see if there’s more than one profile listed. If yes, try the older/default-looking one first. I’ve seen this exact dumb thing happen after an update.
Also, search by file modified date, not just name or size. If Outlook created a fresh blank PST at restart, the newest PST is often the fake one. Your real file may have an older date and a much larger size. People miss that all the time.
Another place worth checking is:
C:\Users%username%\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook
Sometimes attachments live there, so even if the main PST is borked, some saved files may still be recoverable.
If the PST opens but folders are missing, don’t assume it’s dead. Sometimes the folder tree is corrupted while the messages are still inside. In that case, make a copy of the PST first, then test repair tools on the copy only. I never trust Outlook repair on the only copy. Been burned once, not doing that agian.
If the file is truly gone, yeah, then Disk Drill makes sense. I’d use it mostly for finding the original larger PST and exporting it somewhere else. You can also see how Disk Drill features help recover lost Outlook PST files before scanning.
One small disagreement with both of them: don’t keep launching Outlook over and over to “check if it came back.” Every launch can create more mess, new data files, cache junk, and profile changes. Freeze the situation first, then work methodically. That usually saves more data than panic-clicking.
One angle missing in the replies from @cacadordeestrelas, @sternenwanderer, and @mikeappsreviewer: check whether the PST was turned into a hidden or zero-byte file after a bad shutdown or sync conflict. In File Explorer, enable Hidden items and add the Size column. If your old PST shows as 0 KB, recovery is a different problem than “missing path”.
I’d also check Event Viewer > Windows Logs > Application for Outlook or disk errors right around the restart time. If the drive hiccuped, that points more toward file system damage than simple misplacement.
Small disagreement with the “search first, then repair” flow: if this is on an SSD and you think it was actually deleted, time matters because TRIM can wipe recoverable blocks fast. In that case, stop normal use immediately and scan sooner rather than later.
About Disk Drill:
Pros
- good at finding deleted PSTs by signature
- easy to filter by extension and size
- preview and recover to another drive
Cons
- recovery is never guaranteed, especially on SSDs
- deep scans can return multiple confusing PST fragments
- if Outlook kept writing after the loss, results may be partial
If the file comes back but Outlook refuses it, try importing it into a new blank Outlook profile instead of your current one. Cleaner test, less profile corruption baggage.