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My google play is slow and apps which contains sd data are not caching data and showing download the data but data already in SD card
In such a situation, I first suggest removing the updates to the Play Store application.
Menu > Settings> Apps > All > Google Play Store > Uninstall Updates
Once this is done, access Google Play Store, it will update automatically, now see if the issues are still there. If they are, I suggest performing a Factory Data Reset to clear out any issues with the device.
Menu > Settings > Backup & Reset > Factory Data Reset
Be sure to backup any data first.