How to Archive Outlook Emails to Your C Drive as a PST

To archive Outlook emails on your C drive, use classic Outlook for Windows to export the mailbox or selected folders to an Outlook Data File (.pst): choose File > Open & Export > Import/Export, then follow the export wizard and save the PST to a folder such as C:\OutlookArchive. This creates a local copy; it does not remove the original messages from your mailbox. Before starting, make sure you have classic Outlook, enough free disk space, and permission to save files on the computer.

What You’ll Need

Classic Outlook for Windows. The steps below use the desktop app’s Import/Export wizard. The New Outlook interface and Outlook on the web may not show this wizard. If you need a PST and only have New Outlook, see the FAQ below.
Access to the mailbox. Sign in to the account containing the messages you want to archive. If the mailbox is managed by work or school, your organization may restrict exporting.
Room on the C drive. A PST can be large, so check available storage in File Explorer before exporting. Allow extra space for the archive and future growth.
A destination folder. For example, create C:\OutlookArchive in File Explorer. Give the file a clear name, such as Mailbox-2026-11.pst, so you can identify its contents later.
A backup plan. A PST stored only on the computer’s C drive is not protected if the computer fails, is lost, or is reset. Plan to copy the finished archive to an approved backup location.

Step-by-Step

Open classic Outlook and check the mailbox. Start Outlook for Windows and confirm that the correct account and folders are visible. If Outlook is still downloading messages, wait for it to finish syncing before exporting. For a work or school mailbox, check whether your organization has an export policy. You can export only the messages Outlook has available; an incomplete or disconnected mailbox may produce an incomplete archive.
Decide which folders to include. Export the mailbox root if you want a broad archive that includes its folders, or select a specific folder if you only need part of the mailbox. For example, selecting Inbox alone will not include Sent Items. If you want both, export the mailbox root or run separate exports for the folders you need. Consider whether to include old folders, Deleted Items, and other less obvious folders rather than assuming they will be included automatically.
Open the export wizard. In Outlook, select File > Open & Export > Import/Export. In the Import and Export Wizard, choose Export to a file, then select Next. If the File menu or Import/Export option is missing, check that you are in classic Outlook rather than New Outlook or Outlook on the web.
Choose the PST file type. Select Outlook Data File (.pst), then select Next. This format stores Outlook items in a local data file that classic Outlook can open. It is different from an online archive mailbox, which is stored and managed on an email server rather than as a file on your C drive.
Select the folder or mailbox to export. In the folder list, select the mailbox name at the top if you want to export its folders, or select a particular folder such as Inbox. Select Include subfolders when you want folders nested beneath the selected folder included too. Review the selection carefully: choosing a folder without its subfolders can leave out messages stored in nested folders. Select Next when the selection is right.
Choose the file’s location on C. Select Browse, open the C: drive, and navigate to the folder you created, such as C:\OutlookArchive. Enter a distinctive file name, for example C:\OutlookArchive\Mailbox-2026-11.pst, and confirm the save location. Use a date or mailbox name in the file name if you expect to make more than one archive. Avoid saving over an earlier archive unless you have confirmed that replacing it is what you intend.
Set how Outlook handles duplicates. The wizard offers options for duplicate items, such as replacing duplicates with exported items, allowing duplicates, or not exporting duplicates. If this is a first-time export to a new, empty PST, the default choice is usually adequate. If you are exporting into an existing PST, consider whether you want a refreshed copy or additional items; selecting the wrong option can create duplicates or leave older versions in the file. Choose an option that matches your goal, then select Finish.
Set a password only if you need one. Outlook may offer the option to add a password to the PST. You can leave the password fields blank if you do not want password protection. If you set one, store it securely: losing it may prevent you from opening the file. A PST password should not be treated as a substitute for securely storing or backing up the archive.
Wait for the export to finish. Large mailboxes can take time. Keep Outlook open and avoid shutting down the computer while the process is running. When prompted, enter and confirm the optional password, or leave it blank and confirm. The wizard may not provide a detailed progress report for every mailbox, so do not assume the file is ready until Outlook has completed the operation.
Verify the archive before relying on it. In File Explorer, check that the PST exists in the folder you chose and that its size is plausible. In Outlook, use File > Open & Export > Open Outlook Data File, browse to the PST, and open it. Outlook should show the data file in the folder pane. Expand it and inspect several folders and messages, including an older message and one with an attachment if those matter to you. Close and reopen Outlook if you want to confirm the file remains accessible.

Exporting is a copy operation: the source messages normally remain in the original mailbox. If your purpose is simply to keep a local record, stop after checking the PST and keep the original messages. If your purpose is to reduce mailbox storage, first verify the archive and make a separate backup. Only then decide whether to delete anything from the mailbox, and check your organization’s retention rules before doing so.

Common Mistakes

Confusing an Outlook archive button with a C-drive archive. The Archive button often moves messages to an Archive folder in the same mailbox. It does not necessarily create a PST file or save anything to C:.
Exporting only Inbox. This leaves out Sent Items and other folders unless you export them separately. Selecting the mailbox root and including subfolders is usually a better starting point for a broad archive.
Assuming export deletes server copies. Exporting to PST normally copies items. It does not automatically free mailbox space. Conversely, deleting messages in Outlook may sync the deletion to the server and other devices.
Saving to the wrong location. A file saved under a user profile, Downloads, or a synced folder may not be where you expect. Confirm the complete path in the wizard and check the final file in File Explorer.
Overwriting a previous PST. A repeated export can replace an archive if you select the same file and confirm replacement. Use a new date-based file name when you want to preserve earlier exports.
Forgetting subfolders or attachments. Check the Include subfolders setting and inspect representative messages after export. Some attachments may be unavailable if they were never fully downloaded or are stored through a separate cloud link.

Tips

Use a descriptive, dated name. Names such as Finance-2025.pst or Inbox-through-Nov-2026.pst make the contents easier to recognize than archive.pst. Avoid relying on the file’s modified date as the only record of what it contains.
Keep the PST somewhere stable. A dedicated folder such as C:\OutlookArchive is easier to manage than the Desktop or Downloads folder. Do not keep the only copy in a location that may be removed during a Windows reset or profile cleanup.
Make archives by period or purpose. If a mailbox is very large, exporting a year at a time or exporting selected folders can make files easier to handle and verify. Keep a simple note of the date range and folders in each file.
Back up the file after verification. Copy the PST to a secure external drive or approved backup service, following workplace rules for sensitive mail. If you copy the file while Outlook is using it, close Outlook first to avoid copying an active or changing data file.
Remember that a PST is local data. If you use Outlook on another computer, that computer will not automatically see the PST just because it is on this PC. You must transfer the file securely and open it in compatible Outlook software.

Troubleshooting

The Import/Export option is missing. Confirm that you have opened classic Outlook for Windows. New Outlook, Outlook on the web, and Outlook for Mac have different features and menus. If your organization installed only New Outlook, ask your IT administrator whether classic Outlook is available or whether an approved mailbox export method is provided.

The export stops, fails, or takes a long time. Check that the C drive has enough free space and that the destination folder is writable. Close unnecessary applications, keep Outlook open, and retry with a smaller set of folders if the mailbox is large. Make sure Outlook is connected and has finished syncing the folders you selected. If the mailbox belongs to an organization, contact IT if export permissions or retention settings may be involved.

The PST is missing or appears too small. Search File Explorer for the PST file name and check the exact destination shown in the wizard. Confirm that you selected the intended mailbox or folder and enabled Include subfolders where needed. A small file can result from exporting a limited folder, selecting the wrong account, or exporting before messages have downloaded. Repeat the export to a new file name after correcting the selection; do not overwrite your only usable copy.

Outlook says the PST cannot be opened. Verify that the file exists, that it is not still being copied or used, and that you have access to its folder. If you used a password, enter the correct one. A file copied from another computer may be blocked by permissions or security software; use a trusted copy and do not disable security protections without IT guidance. If Outlook reports file damage, preserve the original and ask your administrator or Microsoft support about repair options.

Messages appear to be missing. Expand all folders in the PST and compare them with the source. The wizard exports the selected folder and, only when chosen, its subfolders. Also check whether the message was in another account, an online-only folder, or a folder that had not finished syncing. Attachments that are links to cloud files may remain links rather than become self-contained attachment copies.

Frequently Asked Questions

Does archiving emails to a PST delete them from Outlook?

No. The export process normally makes a copy in the PST and leaves the original messages in the mailbox. If you want to remove mailbox messages to free space, verify the PST and a backup first, then handle deletion separately and confirm that doing so is permitted.

How do I open the PST after exporting it?

In classic Outlook for Windows, select File > Open & Export > Open Outlook Data File, browse to the .pst file, and open it. Its folders should appear in Outlook’s folder pane. Opening it does not automatically move its contents back into your mailbox.

Can I export a PST from New Outlook?

Export options in New Outlook can vary by release and account type, and the classic Import/Export wizard described here may not be available. If you need this specific PST workflow, use classic Outlook for Windows if it is available. If you only have New Outlook, check its current export options or ask your organization’s IT team for an approved method.

Can I make a PST on a Mac?

Outlook for Mac uses different export tools and commonly exports Outlook data to an OLM file rather than a Windows PST. If you specifically need a PST to open in Outlook for Windows, use classic Outlook on Windows or ask your administrator about a supported conversion process.

Can I move the PST to another drive later?

Yes. Close Outlook before moving or copying the PST, then store it on the other drive and use File > Open & Export > Open Outlook Data File to open it from its new location. Keep a backup and avoid removing the original until you have confirmed that the relocated file opens and contains the expected folders.

Is a PST the same as Outlook’s online archive?

No. A PST is a data file stored at a location you choose, such as the C drive. An online archive is a mailbox or folder hosted by an email service or organization. Their storage, access, and retention rules differ, so check with your administrator if you are unsure which kind of archive you need.

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