Is the Sandisk/IOS My Downloads Folder accessible outside the Sandisk app? Can I put the My Downloads folder or a link to it on the Home/Apps screen? Can I access that folder with other apps, like MS Word?
you would need to use the app to access any data on the drive. Depending on the other third party app you are using you may be able to use the share extension or the open in feature of iOS to share the file to the other third party app but the file needs to be donwloaded to the iOS device in order for other apps to use the file.
Tweakbox is the most famous third party app store where you can easily download apps for your Android devices which are not available in the play store abd Appstore TWEAKBOX APK updated