Dialogs which force you to make a decision like this are very unhelpful.
When a destination folder already has a file with the same name, the copy command should check the files for identical contents. If they have identical contents, no question need be asked, the copy is as good as done already. If they don't have identical contents, then the question needs asking, but the dialog should at least include some other information, such as:
1) The sizes of the files.
2) The creation and modification dates of the files.
If you're worried about the speed for file comparision, you should not be. At least on Linux systems I've used, giant files and even whole directories of giant files can be compared in a few seconds and sometimes even under a second. Meanwhile, antiquated (and actually newer in conception) file comparison tools on Windows are unbelievably slow. I believe a good Windows program could do it as fast as on Linux, but atomic file operations have never been a priority a priority for them (or Apple).
If you're still worried about the speed of file comparisons, it would at least be a step forward for dialogs to include the sizes and dates so you could make a sensible judgement without having to open more windows for file examinations yourself.
When a destination folder already has a file with the same name, the copy command should check the files for identical contents. If they have identical contents, no question need be asked, the copy is as good as done already. If they don't have identical contents, then the question needs asking, but the dialog should at least include some other information, such as:
1) The sizes of the files.
2) The creation and modification dates of the files.
If you're worried about the speed for file comparision, you should not be. At least on Linux systems I've used, giant files and even whole directories of giant files can be compared in a few seconds and sometimes even under a second. Meanwhile, antiquated (and actually newer in conception) file comparison tools on Windows are unbelievably slow. I believe a good Windows program could do it as fast as on Linux, but atomic file operations have never been a priority a priority for them (or Apple).
If you're still worried about the speed of file comparisons, it would at least be a step forward for dialogs to include the sizes and dates so you could make a sensible judgement without having to open more windows for file examinations yourself.
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