fix(storage): Fixing watchOS crash when dealing with big files #84

Job	Run time
Build Amplify Swift for macOS / Build Amplify-Package \| macOS	16m 35s
Build Amplify Swift for iOS / Build Amplify-Package \| iOS	5m 7s
Build Amplify Swift for watchOS / Build Amplify-Package \| watchOS	20m 7s
Build Amplify Swift for tvOS / Build Amplify-Package \| tvOS	6m 28s
Confirm Passing Build Steps	1s
	48m 18s

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