Have what I believe is a PST folder of downloaded email from an Optimum Online account.

  • Within Outlook how can one confirm that this is PST file/folder
  • What is the proper way to get these emails to a DVD, then check if the transferred data is correct

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Brief practical checklist that answers and builds on 's verification point.

To confirm the file is a PST and view its contents

  • In Outlook: File > Account Settings > Data Files (or Control Panel > Mail > Data Files) to see paths and extensions. If you only have a loose file, use File > Open & Export > Open Outlook Data File to mount it temporarily and inspect folders and messages. Note the difference: PST is a personal data file; OST is an Exchange/IMAP cache. Always close Outlook before copying the file on disk (Outlook locks PSTs while running).

Prepare and verify before burning

  • Make an immediate copy of the PST to a safe folder. Run the Inbox Repair Tool (scanpst.exe) on that copy to detect/repair corruption; keep a separate backup copy in case the tool changes the file. Create a checksum of the copy so you can verify the burned disc later. Example commands (run in an elevated prompt or PowerShell):
certutil -hashfile "C:\backup\mail.pst" SHA256

or

Get-FileHash -Path "C:\backup\mail.pst" -Algorithm SHA256

Burning and post-burn checks

  • Burn the PST as a data file (not as an audio/video project). Use a burn tool with a verify option, burn at a low speed, and include the checksum output as a small text file on the disc. After burning, copy the PST back from the DVD and re-run the same checksum command; the hashes must match. Finally, open that copied PST in Outlook on a different machine (or a VM) to confirm folders and messages are readable.

Notes and cautions

  • DVDs are fragile and not ideal for long-term archival; if the PST is larger than a single DVD (single-layer ~4.7 GB, dual-layer ~8.5 GB), export smaller date-ranged PSTs via Outlook's Export wizard or use external HDD/USB/cloud storage for safer long-term retention.

Simply, import it. You would wisely export your own data and clear the decks first to avoid confusion. Or, if it's not your .pst, then in a VM.
Any burner will handle the copy to dvd; decent burners allow for integrity checks on the burn (read/compare).

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