When sideloading the game via an APK and OBB installer package, the operating system fails to automatically generate the necessary app data folder structure ( com.ea.game.fifa14_row ) in your local system.

Install FIFA 14 with its OBB files on the emulator and start a Career mode or tournament to trigger a save.

Launch the game and look for an existing save slot to overwrite, rather than creating a brand-new one. Preventative Tips for FIFA 14 Mobile

Note: Do not use "cleaner" apps like CCleaner after this; they often delete the OBB as "junk."

Does the error pop up or only when saving Manager Mode ?

Modern Android updates restrict older apps from writing or modifying data outside their specific sandboxed folders. FIFA 14 tries to save data to a directory it no longer has permission to modify.

When FIFA 14 tries to create or overwrite a save file in your device's directory, modern Android privacy settings block the action. Because the game cannot write data to your storage, it throws the "Save operation could not be completed" error. Step-by-Step Solutions to Fix the Save Error 1. Grant Storage Permissions Manually