FastCopyFastCopy command line reference — every switch explained
fastcopy.exe accepts the full GUI feature set as switches, and fcp.exe is the console variant that waits for completion. Exit code 0 means success, -1 failure. Options with values use name=value; /to=dest_dir always comes last.
Operation modes (/cmd=)
- noexist_only (diff no-overwrite), diff (size/date, default), update (newer).
- force_copy (full overwrite), exist_diff / exist_update (existing, Pro).
- sync / sync_update (mirror), move / move_noexist (move), delete.
- verify, verify_read (show FC info), verify_check (validate FC info, Pro).
UI and control switches
- /auto_close, /force_close, /open_window, /no_ui (background mode), /no_exec (fill only).
- /estimate, /balloon, /error_stop=FALSE, /no_confirm_del, /no_confirm_stop.
- /speed=(full|autoslow|9-1|suspend), /force_start=N, /job=name.
Filters, I/O and metadata
- /include=, /exclude=, /from_date=, /to_date=, /min_size=, /max_size=.
- /bufsize=N (MB), /disk_mode=(auto|same|diff), /low_io, /linkdest, /recreate.
- /acl, /stream, /reparse, /verify, /verifyinfo, /wipe_del, /time_allow=N, /dlsvt=, /postproc=.
- /logfile=, /filelog, /srcfile="files.txt" (UTF-8 list of sources), /ini=.
Example
fastcopy.exe /cmd=diff C:\test /to="D:\Backup Folder\" — a diff copy into a quoted destination. For ready-made automation patterns see our command line tutorial.
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