Recommended Free Tools
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For a large batch of small files, try Windows’ built-in Robocopy with its /MT option. It can copy files concurrently, which may reduce the repeated overhead of creating and transferring each file. Add /LOG to write status to a log rather than the console. The result depends on your files, storage, and connection; Microsoft warns that too many threads can hurt performance, so start with the default and compare on your actual copy job.
Why thousands of small files can copy slowly
A transfer of hundreds, thousands, or even millions of files under 1 MB can take longer than the total data size suggests. Each file requires repeated filesystem work to create and write it; on SMB network copies, protocol overhead adds to that work. Antivirus actions may also recur for each file. As a result, a fast network link does not guarantee that the copy will use its full bandwidth.
File Explorer is convenient for basic copying, but Microsoft says it lacks some performance optimizations available in Robocopy for particular tasks. Robocopy’s multithreaded option can overlap work across files. That can make it faster for a suitable workload, but there is no universal speedup or guarantee that it will beat Explorer for every local or network copy.
Quick wins for a faster PC:
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Open Command Prompt and run this example after replacing the source, destination, and log paths with valid locations:
#1 Best Overall
- Get NVMe solid state performance with up to 1050MB/s read and 1000MB/s write speeds in a portable, high-capacity drive(1) (Based on internal testing; performance may be lower depending on host device & other factors. 1MB=1,000,000 bytes.)
- Up to 3-meter drop protection and IP65 water and dust resistance mean this tough drive can take a beating(3) (Previously rated for 2-meter drop protection and IP55 rating. Now qualified for the higher, stated specs.)
- Use the handy carabiner loop to secure it to your belt loop or backpack for extra peace of mind.
- Help keep private content private with the included password protection featuring 256‐bit AES hardware encryption.(3)
- Easily manage files and automatically free up space with the SanDisk Memory Zone app.(5). Non-Operating Temperature -20°C to 85°C
robocopy "C:Source" "D:Destination" /E /COPY:DAT /MT:8 /LOG:"C:Logscopy.log"/Eincludes subdirectories, including empty ones./COPY:DATcopies file data, attributes, and timestamps. This is Robocopy’s documented default copy set./MT:8runs multiple file copies concurrently. Eight is the default thread count./LOGwrites status output to the named log file, reducing console output. Review the log when the job finishes for skipped files or errors.
This command copies the source tree; it does not mirror or purge the destination. Do not add /MIR unless you intend to mirror directory trees: it can delete destination files and directories that are absent from the source.
Choose a thread count by comparing real copy jobs
Microsoft documents /MT values from 1 to 128, with a default of 8. More threads are not automatically better: excess concurrency can reduce performance, and the best setting depends on the workload and devices involved.
Rank #2
- Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.)
- Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle.
- Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.)
- Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook.
- From Sandisk, a brand professional photographers trust to take on assignments.
- Use the default
/MTsetting, or specify/MT:8, for an initial run. - Repeat the copy with a modestly different thread count, keeping the file set, source, destination, and network the same.
- Compare elapsed time and check each run’s log for errors or skipped files. Use the count that works best for your setup rather than assuming the highest supported value is fastest.
Microsoft’s Azure Files migration guidance reports 8–20 threads as balanced in its described migration context. That observation is specific to Azure Files and should not be treated as a recommended range or benchmark for local transfers.
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/Scopies subdirectories but excludes empty directories; use/Ewhen empty directories should also be copied./Zenables restartable mode, which can resume interrupted file copies. It is not itself a small-file speed optimization./Juses unbuffered I/O. Microsoft recommends it for large files and suggests trying it for files larger than 1 GB in its SMB troubleshooting guidance. It is not the main fix for thousands of tiny files.- More extensive copy flags can include security and ownership information. Use them only when the task requires it.
If Robocopy is still slow, locate the bottleneck
A slow copy can be limited by the source or destination storage, the client, the file server, or the network. On SMB transfers, repeated filesystem and protocol operations, as well as antivirus work on each file, may contribute. Rather than assume the network or a device needs replacing, compare a copy on known healthy storage and try another client. Microsoft’s troubleshooting guidance also recommends testing a copy locally on the file server.
Rank #3
- Easily store and access 2TB to content on the go with the Seagate Portable Drive, a USB external hard drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Compare an archive-first transfer
For a very large set of tiny files, creating an archive, copying that single file, and extracting it at the destination is another option to test. Count the time to create and extract the archive as well as the transfer time. The approach depends on compression and decompression speed, so it is not guaranteed to beat a direct copy.
For transfers involving Azure
For transfers to or from Azure, Microsoft recommends AzCopy, which is designed for cloud workloads. Microsoft’s Azure Files guidance also notes that small-file workloads can be limited by namespace enumeration and that increasing thread counts may help small files without producing proportional gains for large files. Those observations apply to the described Azure context, not as a universal local-copy benchmark.
Quick Recap
Best Value
- Easily store and access 5TB of content on the go with the Seagate portable drive, a USB external hard Drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Rank #4
- NEARLY 2X FASTER THAN OUR PREVIOUS GENERATION(8) – move 1,000 high-res photos in under 60 seconds(6) with up to 2000MB/s transfer speeds(2).
- IP65 RATING AND UP TO 3M DROP PROTECTION(3) – protects against spills and drops.
- POCKET-SIZED – fits easily in pockets and small bags.
- SPACE TO OWN YOUR AI CONTENT – speed and capacity to download your high-res clips and photo edits.
- 256-BIT AES ENCRYPTION(4) – helps keep private files secure with password protection.
Microsoft documentation
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