/data/cache/Here's yet another answer
I just tried to download an app from google play -- 50 megs -- and the app successfully downloaded, but the install failed because I didn't have sufficient memory. But I had still lost 50 megs of phone storage space :-/ which I eventually traced back to /data/cache/ ; there was a 50-meg file in there called downloadfile.apk .
:good:
thank you for useful info.....