Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteTo remove duplicate files from a NAS safely, back up the data first, scan a limited scope without deleting anything, confirm matches by file contents or hashes, and review each file’s path and purpose before removing it. A matching name or size is not proof of a duplicate. Delete a small test batch, check that dependent applications still work, and keep the backup until you have verified the results.
Why names and sizes are not enough
A filename match is only a clue: two files called report.pdf may contain different versions. Matching sizes narrow the search because identical files have the same size, but different files can also have the same size. Modification times provide context, not certainty.
Comparing file contents or full-file hashes gives stronger evidence that two files are identical. QNAP explains that data can change without changing a file’s size or modification time, and describes hash or content comparison as a more reliable integrity check: QNAP’s HBS 3 data integrity guidance. A matching hash is strong practical evidence of matching contents, but it does not tell you which copy to keep or whether both copies serve different purposes.
Prepare a recovery path before scanning
Choose a limited scope
Pause any automatic cleanup and select the specific shares or folders to inspect. Start with ordinary user files you understand. Exclude application-managed libraries, backup repositories, sync roots, and unfamiliar folders until you know how the software using them handles files and references.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Make and test a backup
Create a versioned backup or a separate recoverable copy, then restore at least a sample file to confirm the recovery route works. Synology lists options including Hyper Backup, Snapshot Replication, and USB Copy in its NAS backup guidance. Which tools are available depends on your model, software version, and configuration.
RAID is not a backup: it can help keep a system available after some drive failures, but it does not by itself protect against accidental deletion or every cause of data loss. Snapshots can help recover earlier versions, but they are not a substitute for a backup you have verified can be restored. Synology discusses snapshot protections and their limits in its data protection white paper.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Scan for candidates without deleting them
- Use a read-only or report mode. Have the tool list candidate groups and their full paths. Do not enable automatic deletion on the first pass.
- Record the scope and criteria. Note which shares or folders were scanned, when the scan ran, and whether it compared names, sizes, hashes, or contents. This makes results easier to review and repeat.
- Use metadata to narrow the list. Names and sizes are quick filters; a matching size is a candidate signal, not confirmation. A filename match alone is weaker still.
- Confirm likely matches by content. Compare full-file hashes or contents where practical. Hashing reads the file data, so checking a large NAS may take substantial time and consume NAS or network resources.
Scanning on the NAS can avoid repeatedly transferring file contents over the network, as QNAP describes in its guide to finding duplicate files. That does not make the scan free: it can still use the NAS’s processing power and storage bandwidth. Scanning a mounted share from a computer may be simpler to manage, but content checks can send substantial data across the network.
Choose a method that fits your NAS
| Method | What to know |
|---|---|
| NAS vendor tool | Synology’s Storage Analyzer specifications list duplicate-file detection. Check availability and limitations for your specific NAS, DSM version, and package before relying on it: Storage Analyzer technical specifications. |
| Third-party or command-line tool | QNAP’s guide gives jdupes as an example of a Linux utility and says it is not an official QNAP utility. Confirm current maintenance, compatibility, and the tool’s behavior on your device before installing or using it. Start with reporting rather than deletion. |
| Computer scanning a mounted share | This may be easier to review from a desktop, but reading file contents over the network can create substantial traffic. Check that the scan is limited to the intended mounted folders. |
Whichever approach you choose, favor clear reports, full paths, preview or review controls, and reversible actions over a tool that silently deletes every match. NAS and software support vary, so do not assume a feature or command is safe for your model merely because it works on another system.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Review what each copy is for before removing anything
For each confirmed group, inspect the full paths and consider timestamps, ownership or permissions, application references, and whether a copy is an intentional independent backup. Two identical files can still have different roles—for example, one may be part of a sync workflow while the other is an archival copy. Content equality alone does not make deletion safe.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
- Identify the copy you intend to keep and why.
- Check whether an application, shared link, or workflow depends on the candidate’s location.
- Prefer moving candidates to a quarantine folder on a separate destination, or using a reversible trash or recycle workflow, if your setup supports it.
- Keep the verified backup available while checking that the change caused no problems.
Remove a small batch, then verify it
- Choose a few reviewed files as a test batch rather than deleting every reported match at once.
- Move or delete only the copies you have chosen to remove, using a reversible option where available.
- Open the remaining files and check the relevant applications, shares, sync tasks, and other workflows.
- Test recovery by restoring a removed file from the backup or quarantine location.
- Continue in small batches only after those checks succeed. Retain the backup or quarantine copy until cleanup is complete and the affected data has been verified.
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