Copy file or all files from a folder

You can use the readStream and writeStream to copy a file (or all files from a folder) from one disk to another keeping the memory usage low.

// List all the files from a folder
$files = Storage::disk('origin')->allFiles('/from-folder-name');
 
// Using normal get and put (the whole file string at once)
foreach($files as $file) {
    Storage::disk('destination')->put(
        "optional-folder-name" . basename($file),
        Storage::disk('origin')->get($file)
    );
}
 
// Best: using Streams to keep memory usage low (good for large files)
foreach ($files as $file) {
    Storage::disk('destination')->writeStream(
        "optional-folder-name" . basename($file),
        Storage::disk('origin')->readStream($file)
    );
}

Tip given by @alanrezende