OneDrive Sync Pending Stuck — Files Not Uploading or Downloading

Fix OneDrive sync stuck in pending state where files show a sync icon but never upload or download, causing outdated files across devices. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: OneDrive sync pending means files are queued for upload or download but the sync process is stalled. Files show a blue circular arrow icon indicating they are waiting to sync. The issue can affect individual files, folders, or the entire OneDrive sync client. OneDrive has file size limits (250GB per file) and path length limits (400 characters total path). Sync conflicts occur when the same file is modified on multiple devices simultaneously. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: File name contains characters not supported by OneDrive (# % & { } \ < > * ? / ! ' " : @ + ` | =). File path exceeds 400 characters total (including OneDrive folder path). OneDrive storage quota exceeded — no space to upload new files. Sync client corrupted or stuck in a bad state requiring reset. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Check OneDrive status: click the OneDrive icon in system tray > look for error messages or paused sync. Rename files with unsupported characters and shorten file paths that exceed 400 characters. Check storage: click OneDrive icon > Settings > Account > verify available storage space. Reset OneDrive sync: press Win+R, type %localappdata%\Microsoft\OneDrive\onedrive.exe /reset, press Enter. If reset does not work: unlink and relink the account in OneDrive Settings > Account > Unlink this PC. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Windows Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.