---
title: "OneDrive log analyser for sync troubleshooting | CCP"
description: "Read OneDrive diagnostic logs to investigate sync delays, trace individual files and export your findings. Analysis runs in your browser. No logs are uploaded."
url: "https://ccp.com.au/resources/tools/onedrive-log-analyser/"
---

# OneDrive log analyser

## See what synced. Find what waited.

Read the OneDrive sync client’s diagnostic logs to see what it did and when. Select a log folder or zip to investigate.

At a glance

Processing

In your browser. No logs are sent.

Input

Log folder or zip file

Export

PDF report and CSV files

## OneDrive sync diagnostics

### Read your logs.

### Collect the logs

1.  Pause or quit OneDrive on the affected PC.
2.  Press **Win + R** and open `%LOCALAPPDATA%\Microsoft\OneDrive\logs`.
3.  Select that folder below. To use another computer, zip the folder and select the zip.
4.  Resume OneDrive when you finish copying.

Keep `general.keystore` with the logs. It lets the analyser read encrypted file names.

### Which files do I need?

`Business1` or `Personal` contains sync logs. Include `Common` for Office file locks and co-authoring.

`ListSync` is for Microsoft Lists and is off by default. Telemetry caches (`.otc`) are listed but not read.

### 1\. Select logs

**Processed in your browser.** No log files or log contents are sent to CCP or any other server.

or drag the **logs** folder or zip here

Loading log files0%

Select a folder or zip to begin.

### 2\. Time range and options

Time zone of the PC/user (used for all times) From To Only events matching (text or regex, optional)

### More options

Include timestamped lines from text logs Text-log dates like 03/04/2026 are Report gaps in OneDrive activity longer than (minutes) Max events kept for browsing Records to keep for browsing

Charts and issue detection always use every record; these options only limit what is kept for browsing and tracing.

Analysing logs0%

### 3\. Results

Export: