FastCopy is a lightweight software designed to be a quick copy/delete file manager capable of copying and deleting Unicode along with MAX_PATH(260byte) pathname files. Portable version also available.

Automatically, after whether the copy origin and copy destinations are HDD according to the same physical HDD or is judged, it operates as follows.

Diff HDD: Reading and writing are done with multi-threading in parallel.
Same HDD: Using a big buffer, reading until the buffer becomes full, and writing in bulk.

Because Read/Write doesn´t use the cache of the OS at all, other processes (applications) do not become burdensome.

Read/Write performance is near the limit of the device. Include/Exclude Filter (UNIX Wildcard style) can be specified.

The operation is smooth because MFC is not utilized, making it only from Win32 API.

Similar:

How to Protect Files and Folders from Being Deleted

How to Copy the Path of a File or a Folder to the Clipboard

Version History for FastCopy:
https://fastcopy.jp/help/fastcopy_eng.htm#history