Change internal files storage location

[fvolchyok]

Expected Behavior

Amplitude internal files are stored in specific, system-defined folder and don't pollute /Documents directory reserved for user-generated data.

Current Behavior

Current implementation stores internal Amplitude files in Documents/ directory, which is reserved for user-generated data, as per Apple's File System Programming Guide Table 1-1 and Where You Should Put Your App’s Files section. This approach goes against Apple guidelines and common sense since it causes unnecessary pollution of /Documents directory, forces developers to handle unexpected content there with unnecessary workarounds and in general may even break some apps.

Possible Solution

Change location of internal files from /Documents to /Library/Application Support/ as prescribed by Apple and a common practise among major iOS SDKs.

Steps to Reproduce

1. Integrate Amplitude SDK and launch an app
2. Inspect app directory content via either FileManager (programmatically) or via exporting app data with "Devices and Simulators" -> "Download container..."

Environment

• SDK Version: 1.9.4
• OS Info: iOS 17.6.1