no, in XDK [1621] I have selected in "standard cordova plugin" camera, device, file transfer, while in "featured cordova & custom plugin" only camera plugin.
I tried "invoke download" and "open URL in new windows" with the browser component, and then I tried with the plugin SaveFile [by Pod if I remember correctly]. All work perfectly in chrome preview but after the import in XDK nothing happens, or better, Camera work fine but after snapshot no file is created and nothing is saved in gallery, [in both emulation panel and after compiling apk with "crosswalk for android" build way]
edit: same problem occurs in attempts to generate other files, for example, I tried to save a text string using "invoke downloads of string" with the browser component, that works perfectly in chrome preview, but not in XDK