Yes. Your save files are stored separately from the OBB file. Look in Internal Storage / Android / data / com.rockstargames.gtasa / files / to backup or paste your .b save files.
Double-check the path. It must be Android/obb/com.rockstargames.gtasa/ . Also, ensure the OBB name does not have any extra characters like (1) or -copy . Name must be exact. obb gta san andreas 2.10