Fast_copy new release with new features

v3.7.5 Security

This release includes 1 security fix for security teams reviewing exposed deployments.

Published 1mo Backup & Recovery

✓ No known CVEs patched

This release patches 1 known CVE

Topics

backup cli copy-tool cross-platform deduplication file-copy

+14 more

file-transfer linux macos nas python remote-copy rsync-alternative scp-alternative ssh ssh-transfer synology tar-streaming usb-copy windows

Affected surfaces

auth

Summary

AI summary

Fixed Windows copy crashes, prevented cleartext credential storage on GUI cancel, and normalized permission‑denied errors.

Full changelog

Windows: copies no longer crash. Preserving file mode (the default) called the POSIX-only os.fchmod, which crashed large-file copies on Windows — including copies to UNC \\host\share destinations. Mode is now applied via a path-based chmod fallback.
GUI: credentials are never written in cleartext. Cancelling the encryption passphrase prompt now refuses the save (rolled back) instead of storing passwords/keys unencrypted. Deselecting every preserve option now means "preserve nothing".
Clean errors. A read-only or permission-denied destination reports a single-line error instead of a raw Python traceback.

Upgrade with fast_copy --update, or download a binary below.

GUI: cancelling the encryption passphrase prompt no longer stores passwords/keys in cleartext

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