feat(ins): add faq for migration

faq/blockstorage-migration.mdx

@@ -0,0 +1,69 @@
+---
+meta:
+title: Block Storage Migration FAQ
+description: Explore Scaleway Block Storage with our comprehensive FAQ covering performance, persistence, and more. Learn how Block Storage compares to Local Storage and its compatibility with Scaleway resources.
+content:
+h1: Block Storage Migration
+dates:
+validation: 2025-01-07
+category: storage
+productIcon: BlockStorageProductIcon
+---
+
+Scaleway is transitioning the management of Block Storage volumes and snapshots from the **Instance API** to the **Block Storage API**. This migration enhances performance, scalability, and provides access to new features. Below are the most frequently asked questions regarding this transition.
+
+## What is changing with the migration?
+
+The management of Block Storage **volumes and snapshots** is moving from the Instance API to the Block Storage API. After the migration:
+
+* All your **volumes and snapshots** will be fully managed through the Block Storage API.
+* **New features** and improvements will be available for your volumes, such as resizing and enhanced performance.
+* The existing **Instance API** will no longer handle volume and snapshot operations.
+
+## How do I migrate my existing volumes or snapshots?
+
+For a step-by-step guide, visit [How to migrate volumes and snapshots](/instances/how-to/migrate-volumes-snapshots-to-sbs/).
+
+## What happens if I do not migrate my unified volumes or snapshots?
+
+To ensure continued access to managing your volumes, you must convert your **unified volumes and snapshots** into either **local** or **Block volumes** before the **end-of-life date of June 2nd, 2025**. After this date, unified volumes and snapshots will no longer be supported by any API.
+
+### Key migration deadlines:
+
+* April 30th, 2025:
+	+ Creation of new unified volumes via the Instance API will be disabled.
+	+ Unified volumes will no longer be supported by the Instance API.
+* June 2nd, 2025:
+	+ Unified volumes and snapshots **can no longer be managed via any API**. Existing unified resources must be converted by this date to avoid loss of manageability.
+
+## Will there be any downtime during the migration?
+
+There will be no downtime if you migrate your existing volumes to the Block Storage API, however only the volume's representation is migrated to the SBS API; the data itself does not move.
+
+<Message type="note">
+  This means the migrated volume will not benefit from low latency or higher IOPS, as it **retains the original `b_ssd` characteristics**.
+</Message>
+
+To convert an existing volume to the new Block Storage Low Latency, you can use the [snapshot export/import feature](/instances/how-to/migrate-volumes-snapshots-to-sbs/#migrating-using-the-snapshot-exportimport-features), however this manual process may result in downtime during the volume replacement.
+
+## Will migration affect my billing?
+
+The migration itself is **free**, but after migrating, your volumes will be billed according to the [Block Storage pricing](https://www.scaleway.com/en/docs/block-storage/pricing/).
+
+## How can I convert a Block Storage legacy volume into a Block Storage Low Latency volume?
+
+Although there is no direct way to change the storage class of a volume while preserving its ID, you can still convert a Block Storage legacy volume (along with its data) into a Block Storage Low Latency volume using the snapshot export/import features as a temporary solution. This allows you to transition a Block Storage legacy (`b_ssd`) snapshot into a Block Storage Low Latency (`sbs_5k` or `sbs_15k`) snapshot and then turn the snapshot into a Block Storage Low Latency volume.
+
+<Message type="important">
+  The process below requires manual intervention and **does not preserve the original volume's ID**.
+</Message>
+
+While this approach allows you to transition to a Block Storage Low Latency volume, it is only a workaround.
+
+1. [Create a snapshot of your Block Storage legacy volume](/instances/how-to/create-a-snapshot/).
+2. [Export the snapshot](/instances/api-cli/snapshot-import-export-feature/#exporting-snapshots).
+3. [Import the snapshot into a new Low Latency volume](https://www.scaleway.com/en/developers/api/block/#path-snapshot-import-a-snapshot-from-a-scaleway-object-storage-bucket).
+
+Find out how to [migrate your Block Storage volumes and snapshots](/instances/how-to/migrate-volumes-snapshots-to-sbs/) from the Instance API to the Block Storage API.
+
+Find out about the [advantages of migrating the management of your volumes and snapshots](/block-storage/reference-content/advantages-migrating-to-sbs) from the Instance API to the Block Storage API.