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We've implemented a fix in Blancco Mobile Device Eraser Diagnostics and Erasure v4.7 (tentatively set to release by the end of March 2021) to address the storage capacity detection issues.
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For any questions or inquiries regarding Samsung devices reporting incorrect serial numbers or storage capacities, please contact Blancco Support via email at support@blanco support@blancco.com, or through our web portal.