FastCopy

FastCopy is free open source (GPLv3 license) computer software, a portable file and directory copier that runs under Microsoft Windows.

There are 32- and 64-bit versions, which run under versions of Windows from XP to 10, and Windows Server 2003, 2008,2012,2016. The files comprising 32-bit version 3.05 are about 900kB. It claims to offer fast transfer of files between hard drives and copying of files within the same drive. It can run as a free-standing application, or be integrated into the Windows shell.

In a test conducted in 2008 by lifehacker, Fastcopy was several times faster than its rival Teracopy, a program with similar functionality. However, both programs have been updated since then. A more extensive comparison was performed between TeraCopy v2.07beta, KillCopy v2.85, FastCopy v1.99r4, SuperCopier v2.2bet and published on a forum in 2009.

In Microsoft Windows up to and including at least Windows 7, the Win32 API and any program that uses it (like Microsoft's Windows Explorer) has a limitation of maximum 260 UTF-16 characters (MAX_PATH in windef.h) in file and directory paths when performing file copy and rename (including move or deletion) operations, but not in file access (e.g. execution or reading) operations; but this limitation becomes 32,768 when a program uses its own code over the NT kernel for file operations or unlimited if a program accesses the NTFS file system directly in low-level. FastCopy does not use Microsoft's API and places its own calls to the NT kernel, therefore enabling a user or system administrator to perform file copy, move or delete operations even if the file or directory paths involved exceed 260 characters.

In 2015, FastCopyV2.11(BSD License) was ported to Mac OS X by Japanese PostProduction "L'espace Vision". It is sold on the Mac App Store as "RapidCopy".

In 2016, "L'espace Vision" released the Linux version of "RapidCopy for Linux" on Github. Source Licene is BSD 2-Clause License.