FastCopyFastCopy Guides — Make Every Windows File Copy Faster
FastCopy is the fastest file copy and backup software on Windows. Practical FastCopy tutorials, verified settings, command line examples and honest comparisons with TeraCopy and Robocopy — fix slow copies and CRC errors with steps you can follow directly.
Direct link to fastcopy.jp · free for home use · no bundling
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Measured throughput
10GB single file · NVMe → NVMeFastCopy Tutorials — Settings, Command Line & Error Fixes
One page per search intent: buffer size, command line, exclude filters and CRC error fixes — tested on real hardware.
FastCopy complete tutorial: from install to your first copy
A step-by-step guide for beginners, covering every button in the main window and common pitfalls.
Settings / PerformanceWhich buffer size is fastest? Values by drive type
A comparison table of parameters for HDD, SATA SSD and NVMe scenarios.
Error troubleshootingCRC errors while copying: 5 causes and the matching fix
From cables to bad sectors, ordered from most to least likely.
Command lineCommand line reference: batch jobs and automated backups
Includes 5 ready-to-use command line examples.
Filter rulesExcluding folders and file types: wildcard syntax that works
UNIX-like wildcard syntax explained, with ready-made exclusion templates.
Advanced / TroubleshootingCopy speed suddenly dropped? 4 system causes to check
Telling software settings problems apart from hardware and driver issues.
FastCopy vs TeraCopy vs Robocopy: File Copy Tools Compared
Same tasks, same machine — throughput, verification and licensing, with a verdict for each use case.
| Capability comparison | FastCopy | TeraCopy | Robocopy |
|---|---|---|---|
| Multi-threaded read / write / verify | Yes | Partial | No |
| Per-file hash verification | Perfect Verify | Yes | No |
| Graphical interface | Yes | Yes | CLI only |
| Free for personal use | Yes | Trial only | Built into Windows |
| Mirror / sync mode (deletes extras) | /cmd=sync | No | /MIR |
| Best for | Large files / batch backups | Everyday drag-and-drop comfort | Scripted / enterprise automation |
FastCopy Alternatives for Mac and Linux
FastCopy is Windows-only — the fastest ways to copy files on macOS and Linux.
FastCopy for Mac: the fastest ways to copy files on macOS
FastCopy does not run on macOS, and nothing replicates it one-to-one. But between Finder settings, two built-in command line tools and one dedicated app, every FastCopy use case has a good macOS answer.
ViewFastCopy for Linux: high-speed copying with rsync, cp and friends
FastCopy does not run on Linux, but Linux file copying is a first-class citizen: cp --reflink can be near-instant on the right filesystems, rsync handles diff and mirror work, and parallel tools squeeze multi-core machines.
ViewFastCopy download guide
Where to get FastCopy safely — official links only, with verification steps. This site never hosts installers.
ViewFastCopy FAQ & Version History
Short answers to real user questions, plus what each FastCopy update means for you.
Frequently asked
View all 8QWhich buffer size is fastest?
On SSDs the default 2 MB is near-optimal. On mechanical HDDs, 1 MB with OverLap I/O enabled usually measures faster — the default changed to 2 MB in v5.11.0 and HDD users noticed. Read the full guide →
QHow do I push an NVMe drive to its throughput limit?
Run as administrator, then enable pre-allocated space — measured 20–30% extra throughput on NVMe-to-NVMe copies. Full parameters and caveats in the guide. Read the full guide →
QHow do I exclude folders or file types from a copy?
Semicolon-separated wildcards in the Exclude field: *.tmp;node_modules\. A trailing backslash excludes a whole directory. Read the full guide →
QCopying fails when the destination is a drive root — what now?
A drive root path (like D:\) cannot have its trailing separator stripped automatically, which triggers an error. Append * to the source path instead of changing the destination.
Version history
Full changelogAdded a shell-extension option to replace Explorer drag-and-drop/paste with FastCopy (off by default); hardened the executable with CET shadow stack (/CETCOMPAT), Control Flow Guard (/guard:cf) and safer DLL loading (/DEPENDENTLOADFLAG).
Swapping source and destination now works correctly with multiple files selected; fixed a hang when a network drive disconnected during a move.
On Windows 11, right-clicking OneDrive placeholder files in the shell extension no longer triggers their automatic download.
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