Not deleted files, but explorer would copy system and hidden files in that folder i believe. (this is when you select/copy a folder, not a file or file(s)).
If you select a file or files and no folders then it's very simple: the files you selected wil be copied. If a selected set of files however also includes a folder then the above rule about copying folders applies.
If you open the folder that contains the recyclebin (you would have to set explorer to show hidden files and system files) and copy the files in them, then you copy "deleted" files, although those files aren't realy deleted but instead moved to that special folder.
It doesn't matter what the filesystem is when copying as long as the filesystem is recognized by the operating system, or the application that you use to copy with. A rather unimportant exception might be that files in different filesystem make use up a slightly different amount of space, but the data stored in the files wil remain exactly the same.
For the sake of clarity i always make windows explorer show hidden and system files, and also the file-extentions of known file-types. These settings don't influence the above rule about copying folders though (at least in my version of explorer in windows xp), so even when not displaying hidden or system files they still wil be copied when present in a folder you selected to be copied.
Hiding hidden and system files is a default setting to prevent computer-novices from doing something harmfull to the computer, like deleting important system files, whilst hiding file-extentions is supposed to look neater. These settings limit the view of non-novice on the computer though. So if your computer isn't accessed by people that don''t know what they are doing it's best to display everything that can be displayed.
If it's important though that some files get copied, or get not copied, always verify the result. A good way to loose files is thinking you copied them whilst you actually didn't. Happened to me once, making me loose a carefully created simcity 4 map that i thought i made a copy of.
Add. info:
A hidden file is a file with the hidden attribute set. A file atribute is a simple flag that tells something about the file, so the operating system and/or application handling the file knows how to treat the file. There are 4 standard file-attributes:
- hidden (marks the file as hidden)
- system (marks the file as being an important system file)
- read only (marks the file as undeletable)
- archive (indicates wether the file has been backed up)
File-attributes can be manually set. If you for instance look at the properties of a file you likely wil be able to set or undo the hidden or read only attribute. The other attributes (system/archive) may be set also using other means, but because changing these attributes can have a bigger impact it isn't made that simple to change them.