Your GPv1 Storage Accounts have a migration deadline, or a “do nothing” option that’ll quietly cost you money

This article warns about the upcoming retirement of General Purpose v1 (GPv1) and legacy Blob storage accounts in Azure, with a deadline of October 13, 2026. Microsoft will auto-migrate remaining accounts to GPv2, but inaction may lead to significant cost increases for workloads with high transaction volumes, as GPv2 raises transaction prices dramatically. The article explains the timeline, the one-way migration, and provides cost comparison examples showing that while GPv2 reduces storage costs, it can be up to 150x more expensive for write/list operations. It advises readers to proactively migrate to avoid unexpected bills and loss of control over migration timing.