X210APM 8.1.0 unlock failed.

always fail in this step:

Copying on SD Card…
Please, insert / reinsert SD Card into Phone. Then press "OK"
button.
Failed!

I use a 4 gb fat32 memory also a usb card reader as sugested by software

Work ID: 00000000006A69C0
Checking data…OK
Platform: LG Qualcomm
Selected port: COM29
Selected model: LMX210APM
Reading info…
Model ID: LM-X210APM
IMEI: 355437-10-330277-9
Android version: 8.1.0
Battery level: 100%
Mode: Emergency
Initializing flash…OK
Platform: msm8937
SW version: LMX210APMAT-01-V20e-310-410-APR-04-2019-
ARB03+0
Android version: 8.1.0
LAF Version: 1.1
Product ID: VS02S190619004702
IMEI: 355437-10-****************
Target operator: ATT
Hardware: rev_10
Please, select Unlock Method!
Selected Unlock via SD Card
(with Unlock APK)
Unlock operation for LMX210APM will delete all user data on the
phone (contacts, pictures and others)!
Do You want to continue?
Connecting to server…OK
Octopus smart card is present.
Checking smart card…OK
Username: eduardmt
Authorizing…OK
Checking balance…OK
Checking operation…OK
Sending device information…OK
Get credits, needed for current operation…OK
Your balance: 102 credits.
To perform "Unlock" operation you need to have 100 credits.
Prepairing loader…
Step 1…
Step 2…
Step 3…
Copying on SD Card…
Please, insert / reinsert SD Card into Phone. Then press "OK"
button.
Failed!
Rebooting phone…
Performed by 3.0.8 Software version.

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