My first suggestion would be to stop using the SanDisk app, as it is dismal at best. For file manipulation, use FileBrowser. It will allow you to make folders on the WMD or SD card, and copy/move files from/to any folder, including cloud storage. Otherwise, you’ll be stuck uploading all your files to one huge folder on the WMD or SD card. FileBrowser MAY also copy/move files without corrupting the dates, though I haven’t tested this.
For movie playback, use nPlayer. It won’t solve the DRM issue (never trust an app that says it does, because Apple will eventually break it), but it is a vastly better playback experience. It will also allow you to get video clips from your camera SD card into iMovie, if that should ever matter to you. The SanDisk app can’t boast that.
No affiliation with either app.
