The officer walks up, asks for your logs and gives you a code. If you've done a data transfer before, it takes a minute. If you haven't, it can turn into ten awkward minutes of tapping through menus while the officer waits. Practice once at home and you'll never have that problem.

This guide covers how ELD data transfer works, step by step instructions that apply to most apps, what to do with the output file comment, and how to handle a transfer that fails. Rules were checked against 49 CFR Part 395 and FMCSA's ELD guidance in October 2026. For the broader rules, see ELD mandate facts and compliance and our hours of service guide.

Transfer Methods

Every FMCSA registered ELD has to support at least one complete transfer option:

• Telematic transfer, which means web services and email.
• Local transfer, which means USB and Bluetooth.

Most ELDs today use telematic transfer. You'll see which one your ELD supports on FMCSA's registered list.

Web services

The ELD sends the data straight to FMCSA's system over the internet. The officer then pulls it up using their software. This is the most common method.

Email

The ELD sends an encrypted file by email to FMCSA's ELD address, not to the officer's personal inbox. The officer retrieves it through FMCSA's system. If an officer asks you to email logs to their own address, that's not how the standard telematic email transfer works, though some officers may also ask to view the display.

Local transfer

With USB, the officer gives you a secure USB drive, or you use one approved for the purpose. With Bluetooth, the ELD pairs with the officer's device. Local transfer is less common at roadside.

Display or printout

The driver must also be able to show the logs on the ELD's screen or provide a printout. That's what you do while the transfer runs or if it fails.

Step By Step: Telematic Transfer

The menu names vary by app, but the steps are nearly identical across ELDs.

1. Stay calm and stay seated until the officer asks for logs. Make sure the truck is stopped and safe.
2. Open your ELD app and find the inspection or roadside mode. It's often called "Inspection," "DOT Inspection" or "Roadside."
3. Choose to send or transfer logs. You may see "Send logs to FMCSA," "Data Transfer" or similar.
4. Pick the method the officer asks for: web service or email.
5. Enter the output file comment. The officer will give you a code, sometimes called a routing code or comment. Type it exactly as given.
6. Confirm and send. The app should show a success message.
7. Tell the officer it's sent and show the success screen if they want to see it.
8. Hand over the display if asked. Officers may also want to look at the logs on your screen.

The Output File Comment

The output file comment is a short code the officer gives you. It's attached to the file you send so the officer can find your data in FMCSA's system. Without it, your file may be hard for the officer to locate.

Tips:

• Ask the officer to repeat it if you're not sure.
• Type it exactly, including letters and numbers.
• Don't add your own notes to the comment field.

What The Officer Sees

The transfer includes your records for the current 24 hour period and the previous 7 days, plus unidentified driving records for the vehicle, malfunction and diagnostic events, and edit history. If you've got messy edits or unassigned driving, this is where they show up. Our guides to editing ELD logs and unidentified driving records explain how to keep those clean.

When The Transfer Fails

It happens. Weak cell signal, an app glitch or a server issue can stop a telematic transfer.

Try the basics first

1. Check your connection. Move to an area with signal if the officer allows.
2. Retry once or twice.
3. Try the other telematic option. If web service fails, try email, or the other way round.
4. Restart the app. It's quick and clears many glitches.

Show the display

If the transfer still won't go, show the logs on your screen. That's an accepted way for the officer to review your records at roadside.

Know the malfunction rules

If the ELD has a data transfer malfunction, the rules set out what happens next:

• The driver must note the malfunction and notify the motor carrier in writing within 24 hours.
• The driver must reconstruct records of duty status for the current day and the past 7 days on paper or in a way the officer can review, unless the ELD can still show them.
• The carrier must repair or replace the ELD within 8 days of finding out, unless FMCSA grants an extension.

ELDs check their own data transfer function regularly and show a diagnostic or malfunction indicator when it fails, so don't ignore those warnings.

What To Keep In The Cab

Under 49 CFR 395.22(h), drivers must carry:

• A user's manual for the ELD.
• An instruction sheet describing data transfer and how to show the officer the records.
• An instruction sheet for reporting malfunctions and recordkeeping during a malfunction.
• A supply of blank paper logs for at least 8 days.

These can be electronic, but paper backups help when the tablet is the problem.

Practice Run

Before your first inspection, or after switching ELDs, practice:

1. Open roadside mode.
2. Start a transfer using a test comment, if your ELD supports a test mode, or ask your provider how to practice safely.
3. Time yourself.
4. Find the display mode for showing logs on screen.
5. Confirm you know where the instruction sheets are.

Ten minutes at the terminal saves you a lot of stress at a weigh station.

Frequently Asked Questions

How do I send my ELD logs to an inspector?

Open your ELD's roadside or inspection mode, choose to send logs, pick web service or email, enter the output file comment the officer gives you and send.

Do I email logs to the officer?

Standard telematic email transfer sends an encrypted file to FMCSA's ELD address, and the officer retrieves it from FMCSA's system.

What is the output file comment?

A code the officer gives you that's attached to your file so they can find it.

What if the transfer fails?

Retry, try the other method and show the logs on your screen. If the ELD has a malfunction, notify your carrier within 24 hours and follow the malfunction rules.

How many days of logs are transferred?

The current 24 hour period and the previous 7 days.

Sources

• 49 CFR 395.22 and 395.34, ecfr.gov, checked October 2026.
• 49 CFR Part 395 Subpart B Appendix A, ELD data transfer specifications, ecfr.gov, checked October 2026.
• FMCSA ELD roadside and data transfer guidance, eld.fmcsa.dot.gov, checked October 2026.

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