Methods, systems, and computer-readable media are provided. Some embodiments include receiving, at a first server from a client, a request to access a data object associated with an application on a second server. The first server sends a request for the data object to the second server and the first server receives the data object from the second server. The first server receives a first file from the client and determines whether a second file is attached to the data object. In response to determining that the second file is attached to the data object, the first server obtains the second file and generates a third file by merging the first file and the second file, and an update process is performed such that the third file is attached to the data object and the second file is not attached to the data object.