title: MediaLibrary.saveToLibraryAsync Error: Unable to copy file into external storage
body: <p>I'm attempting to save a video to my cameraRoll in React Native on Android, console returns the video uri perfectly fine, but I get the error.</p>
  <p><code>Error: Unable to copy file into external storage.</code></p>
  <p>However, when putting the code on Snack, it works fine. Just not when I do a</p>
  <p><code>react-native run-android</code></p>
  <p>Here is the console logs</p>
  <pre><code>[Mon Aug 02 2021 21:03:30.108]  LOG      Video source:  file:///data/user/0/com.allies.ai/cache/Camera/74eb667a-a799-4f4e-8d80-98261580c36e.mp4
  [Mon Aug 02 2021 21:03:32.222]  WARN     Possible Unhandled Promise Rejection (id: 0):
  Error: Unable to copy file into external storage.
  promiseMethodWrapper@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:4552:45
  http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:109931:40
  saveToLibraryAsync$@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:228365:95
  tryCatch@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25289:23
  invoke@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25462:32
  tryCatch@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25289:23
  invoke@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25362:30
  http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25392:19
  tryCallTwo@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:27386:9
  doResolve@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:27550:25
  Promise@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:27409:14
  callInvokeWithMethodAndArg@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25391:33
  enqueue@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25396:157
  async@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25413:69
  saveToLibraryAsync@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:228352:38
  recordVideo$@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:228022:48
  tryCatch@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25289:23
  invoke@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25462:32
  tryCatch@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25289:23
  invoke@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25362:30
  http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:25372:21
  tryCallOne@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:27377:16
  http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:27478:27
  _callTimer@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:30917:17
  _callImmediatesPass@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:30956:17
  callImmediates@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:31173:33
  __callImmediates@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:5034:35
  http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:4820:34
  __guard@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:5017:15
  flushedQueue@http://localhost:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:4819:21
  flushedQueue@[native code]
  invokeCallbackAndReturnFlushedQueue@[native code]
  </code></pre>
  <p>Here is the code on Snack:</p>
  <p><a href="https://snack.expo.dev/@ptang/camera" rel="nofollow noreferrer">https://snack.expo.dev/@ptang/camera</a></p>
  <p>Thanks in Advance.</p>