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Drag&Drop Tab
The Drag&Drop tab allows you to configure behaviour of WinSCP when transfering files using drag&drop to other applications. It does not affect drag&drop within WinSCP (for example between local and remote panels of Norton Commander interface).
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The Allow moving from remote directory to other applications checkbox is by default disabled allowing you to only copy files using drag&drop. The reason behind this is that users expect the “copy” to be default drag&drop operation (the one performed what you do not hold any of Ctrl/Shift modifiers). Unfortunatelly it is always the target application (Windows Explorer usually), that selects the default drag&drop operation. The only thing that WinSCP can do to force “copy” be the default is disable “move” operations all together. This would force Explorer to use “copy”, because there wouldn’t be another option.
Shell Extension mode
Use Use shell extension button to select Drag&drop Shell Extension download mode. With the mode you can download the files directly to target folder using drag&drop. If the button is disabled (grayed), you have either not installed the extension yet or not restarted your computer since.
Temporary Folder mode
Use Use temporary folder to select temporary folder download mode, if you cannot use the Drag&drop Shell Extension or you need to overcome its limitations. You can change the location for temporary folder on Storage tab.
The Warn where there is not enough free space makes WinSCP try to guess if the files to be downloaded fits into the temporary directory.
The Warn when moving via temporary directory is enabled only when Allow moving from remote directory to other applications is checked. It makes WinSCP warn you that moving files from remote directory to local one via temporary folder is dangerous. WinSCP loses control of the download once it finishes transfer of the files to the temporary directory. Thus this is its last chance to remove the files from remote directory. If the target application (Windows Explorer) fails to deliver the files from temporary folder to target folder, you may lose your files.
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