My function (Swift):   

KCSFileStore.deleteFile(fileId, completionBlock:
            {
                (count, errorOrNil) -> Void in
                
                slotOneBusy = false
                numOfBusySlots -= 1
                
                if errorOrNil == nil
                {
                    idsOfDeletedFiles.append(fileId)
                    print("\nFile successfully deleted! (One)\n")
                }
                else
                {
                    print("\nError deleting file:")
                    print("\(errorOrNil!)\n")
                }
            }
        )

Response Log:

Error Domain=KCSResourceErrorDomain Code=401 "Error Deleting file, id='577c08aa-c3a5-4d85-80c0-12a4a5b79419'" UserInfo={NSUnderlyingError=0x15d08a80 {Error Domain=KCSServerErrorDomain Code=401 "The credentials used to authenticate this request are not authorized to run this operation. Please retry your request with appropriate credentials" UserInfo={Kinvey.kinveyErrorCode=InsufficientCredentials, NSLocalizedFailureReason=, NSLocalizedDescription=The credentials used to authenticate this request are not authorized to run this operation. Please retry your request with appropriate credentials, KinveyKit.HTTPMethod=DELETE, NSErrorFailingURLKey=https://baas.kinvey.com/blob/kid_bkctkcwMmW/577c08aa-c3a5-4d85-80c0-12a4a5b79419, Kinvey.RequestId=5466d9dbc49b4485ac17687faa082017}}, NSLocalizedDescription=Error Deleting file, id='577c08aa-c3a5-4d85-80c0-12a4a5b79419'}

Thanks in advance!

Hi Pranav, sorry the delay. I've already solved the problem: if you set file as globally writable when you save it, then anyone can delete it.

Thank you,

Nissi