Sigmabox problem

I am trying to replace the modem of a motorola x2, but it is stuck in file transfer, I need your help

SigmaKey 2.21.00 Qcom: Downgrade Motorola modem
^ Android ADB Interface, Version 0.5, Name: victara, Serial number: TA4490B7YA
Firmware: Motorola XT1097
File transferring…