Copyr

Finder aborts a three-hour copy at 92% because of one bad file, and it never checks that the copy matches the original. Copyr queues copy jobs, pauses and resumes them mid-file, picks up where it left off after a drive is unplugged, skips unreadable files into an end-of-job report instead of stopping, and optionally checksums every byte. Free for personal use; $5 business license.

Drop. Preflight. Copy. Report.

1. Give it the files: Drop them on the window, press ⌘O, or right-click in Finder and pick Copy with Copyr. There's a Services entry too, which you can bind to a keyboard shortcut.
2. Read the preflight: Before a byte moves: how much free space you'll have left, which files are iCloud placeholders about to be downloaded, anything already unreadable, and whether the destination is a network mount.
3. Watch it run: A live speed graph of the last minute. Pause whenever you like. It flushes to disk first, so a pause is always a safe moment to unplug. Unplug without pausing and it waits for the drive.
4. Read the report: Every skip and failure, each with a reason and an errno. Copy it as text, or save the failures as CSV. A clean job just says so and gets out of your way.