[2025] Well Fixed “Syncthing Slow” Issue

If you've ever wrestled with Syncthing Slow, you know that sinking feeling when you're waiting... and waiting... for files to sync. It's a fantastic tool, but let's be honest, 'speedy' hasn't always been its middle name. 

Well, good news! Heading into 2025, it looks like those frustrating slowdowns might finally be a thing of the past. Let's dig into what's changed and why we can (hopefully) expect a much snappier experience.

Issue 1: Syncing Slow on LAN

A Local Area Network (LAN) is supposed to provide high-speed file transfers, but many users still experience slow syncing speeds.

This issue often arises due to:

• Network congestion – Too many devices are using the LAN.
• Incompatible hardware – Outdated routers or network adapters.
• Incorrect network settings – Poorly configured QoS settings or firewalls.
• Interference from other devices – Overlapping frequencies affecting Wi-Fi networks.
• Outdated syncing software – Running an old version with performance bugs.

These factors significantly impact LAN file synchronization, causing delays even when transferring files between computers on the same network.

How to Fix: Syncing Slow on LAN

To restore optimal syncing speeds, try these fixes:

1. Upgrade Your Router & Network Equipment – Use a Gigabit router and Cat6 cables for wired connections.
2. Optimize QoS Settings – Prioritize syncing traffic to prevent slowdowns.
3. Use a Wired Connection – Wi-Fi speeds fluctuate, whereas Ethernet provides stable speeds.
4. Close Unnecessary Network Applications – Stop bandwidth-heavy applications like video streaming or gaming.
5. Disable Firewall Restrictions – Check your firewall settings to ensure syncing software is not being throttled.
6. Update Syncing Software – Ensure you use the latest version for bug fixes and optimizations.

By following these steps, you should experience significantly faster LAN syncing speeds.

Issue 2: Slow Transfer Speed when Using Syncing

Cloud-based syncing services, like Google Drive or OneDrive, often suffer from slow transfer speeds due to:

• Limited upload/download speeds – Some services throttle bandwidth usage.
• Cloud server congestion – High traffic can slow down data transfers.
• Poor internet connection – Slow broadband speeds directly affect syncing.

Background processes consuming bandwidth – Other applications like video calls or software updates reduce available bandwidth.

How to Fix: Slow Transfer Speed When Using Syncing

Try these steps to speed up cloud-based syncing:

• Enable Bandwidth Prioritization – In your syncing software settings, allocate higher bandwidth for file transfers.
• Use a VPN for Better Routing – A VPN can sometimes provide a more stable connection to cloud servers.
• Pause Background Applications – Close apps like Zoom, Netflix, or large downloads to free up bandwidth.
• Schedule Syncing During Off-Peak Hours – Sync files at night when network traffic is lower.
• Upgrade Your Internet Plan – A higher-speed plan can dramatically improve syncing performance.
• Use a Dedicated Syncing Tool – Business-grade tools like Raysync provide superior syncing speeds compared to free cloud services.

Issue 3: Syncing Slow with Massive Files

When syncing large files (e.g., videos, raw images, or databases), you can experience syncthing slow issues due to some of these reasons:

• Inefficient chunking – Some sync software doesn’t optimize large file transfers.
• High encryption overhead – While encryption is necessary, it can slow down syncing.
• Server-side throttling – Many cloud providers impose size-based speed restrictions.
• Low RAM or CPU Performance – Older devices struggle with processing large files efficiently.

How to Fix: Syncing Slow with Massive Files

Follow these strategies to enhance syncing speeds for massive files:

• Split Large Files – Use tools to break files into smaller parts before syncing.
• Use Compression – Compress large files into ZIP or RAR formats before syncing.
• Upgrade to SSD Storage – SSDs handle read/write operations faster than HDDs.
• Disable Encryption for Trusted Transfers – If security isn’t concerned, turning off encryption speeds up transfers.
• Use a High-Speed Syncing Solution – Tools like Raysync are designed to handle large data transfers efficiently.

Best Syncthing Alternative for Business Use - Raysync

Okay, let's chat about syncing files. It's a pain when it's slow, right? We've all been there. Little tweaks help, sure, but sometimes you need real speed. Especially if you're dealing with huge files or if it's for work, you know?

That's where tools like Raysync come in. They're built for speed and security, so you don't have to wait forever. Imagine, no more staring at loading bars! Whether it's for your business or just keeping your stuff organized, a fast, reliable sync makes life easier. Forget the frustrating delays and get your files moving.

Let’s look at some pros of Raysync:

• Unmatched Speed – Uses intelligent acceleration to achieve 100x faster speeds.
• Seamless Integration – Works with cloud storage, enterprise servers, and local networks.
• Optimized for Large Files – Handles multi-terabyte transfers without slowdowns.
• Multi-Device Support – Syncs across Windows, macOS, and Linux.
• Military-Grade Security – AES-256 encryption for secure data transfers.
• No Bandwidth Limitations – Fully utilizes available network resources.
• Reliable Even on Weak Networks – Maintains stable performance even with poor connectivity.

Let’s look at some cons of Raysync:

• Paid Solution – Unlike free syncing apps, Raysync is a premium service, but its unmatched speed and security make it worth the investment.

Pricing Model of Raysync:

• Raysync Cloud: $99/month.
• Raysync SMB: $1,599/year.
• Raysync Enterprise: Customized plans for large-scale enterprises.

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The End

Syncthing slow in 2025? It's still a thing. Tweaks help, but for serious speed, especially at work, consider Raysync. It's built for fast, reliable transfers. "Well-fixed" means knowing Syncthing's limits and choosing the right tool for the job.