: Because MEGA uses zero-knowledge encryption , the .getxfer request fetches the encrypted data, which is then decrypted locally in your browser or app using the key included in the URL (the part after the # symbol).

: If you aren't actively transferring anything, you can safely delete the reclaim your storage space

When the target function is called, .getxfer intercepts the arguments: source pointer, destination pointer, and number of bytes to transfer.

: Once a transfer is 100% complete, the MEGA client automatically converts the .getxfer file into the final file format (like .zip , .mp4 , or .iso ) and deletes the temporary version.

In rarer programming contexts, such as the DCMTK (DICOM Toolkit) , getXfer is a function used in to retrieve the "Transfer Syntax" of a medical image file. This is unrelated to the MEGA cloud storage file but is a common search result for developers.