diff --git a/dev/tool/src/index.ts b/dev/tool/src/index.ts
index 0f87adf1c3..f7aebcb3d3 100644
--- a/dev/tool/src/index.ts
+++ b/dev/tool/src/index.ts
@@ -991,7 +991,8 @@ export function devTool (
     .command('move-files')
     .option('-w, --workspace <workspace>', 'Selected workspace only', '')
     .option('-bl, --blobLimit <blobLimit>', 'A blob size limit in megabytes (default 50mb)', '50')
-    .action(async (cmd: { workspace: string, blobLimit: string }) => {
+    .option('-c, --concurrency <concurrency>', 'Number of files being processed concurrently', '10')
+    .action(async (cmd: { workspace: string, blobLimit: string, concurrency: string }) => {
       const { mongodbUri } = prepareTools()
       await withDatabase(mongodbUri, async (db, client) => {
         await withStorage(mongodbUri, async (adapter) => {
@@ -1010,7 +1011,10 @@ export function devTool (
               }
 
               const wsId = getWorkspaceId(workspace.workspace)
-              await moveFiles(toolCtx, wsId, exAdapter, parseInt(cmd.blobLimit))
+              await moveFiles(toolCtx, wsId, exAdapter, {
+                blobSizeLimitMb: parseInt(cmd.blobLimit),
+                concurrency: parseInt(cmd.concurrency)
+              })
             }
           } catch (err: any) {
             console.error(err)
diff --git a/dev/tool/src/storage.ts b/dev/tool/src/storage.ts
index f091549a37..47387298de 100644
--- a/dev/tool/src/storage.ts
+++ b/dev/tool/src/storage.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 //
 
-import { type Blob, type MeasureContext, type WorkspaceId } from '@hcengineering/core'
+import { type Blob, type MeasureContext, type WorkspaceId, RateLimiter } from '@hcengineering/core'
 import { type StorageAdapterEx } from '@hcengineering/server-core'
 import { PassThrough } from 'stream'
 
@@ -21,7 +21,10 @@ export async function moveFiles (
   ctx: MeasureContext,
   workspaceId: WorkspaceId,
   exAdapter: StorageAdapterEx,
-  blobSizeLimitMb: number
+  params: {
+    blobSizeLimitMb: number
+    concurrency: number
+  }
 ): Promise<void> {
   if (exAdapter.adapters === undefined) return
 
@@ -35,7 +38,11 @@ export async function moveFiles (
 
   for (const [name, adapter] of exAdapter.adapters.entries()) {
     if (name === target) continue
-    console.log('moving from', name)
+    console.log('moving from', name, 'limit', params.blobSizeLimitMb, 'concurrency', params.concurrency)
+
+    let time = Date.now()
+
+    const rateLimiter = new RateLimiter(params.concurrency)
 
     const iterator = await adapter.listStream(ctx, workspaceId)
     while (true) {
@@ -46,29 +53,37 @@ export async function moveFiles (
       if (blob === undefined) continue
       if (blob.provider === target) continue
 
-      if (blob.size > blobSizeLimitMb * 1024 * 1024) {
+      if (blob.size > params.blobSizeLimitMb * 1024 * 1024) {
         console.log('skipping large blob', name, data._id, Math.round(blob.size / 1024 / 1024))
         continue
       }
 
-      try {
-        await retryOnFailure(
-          ctx,
-          5,
-          async () => {
-            await moveFile(ctx, exAdapter, workspaceId, blob)
-          },
-          50
-        )
-      } catch (err) {
-        console.error('failed to process blob', name, data._id, err)
-      }
+      await rateLimiter.exec(async () => {
+        try {
+          await retryOnFailure(
+            ctx,
+            5,
+            async () => {
+              await moveFile(ctx, exAdapter, workspaceId, blob)
+            },
+            50
+          )
+        } catch (err) {
+          console.error('failed to process blob', name, data._id, err)
+        }
+      })
 
       count += 1
       if (count % 100 === 0) {
-        console.log('...moved: ', count)
+        await rateLimiter.waitProcessing()
+        const duration = Date.now() - time
+        time = Date.now()
+        console.log('...moved: ', count, Math.round(duration / 1000))
       }
     }
+
+    await rateLimiter.waitProcessing()
+
     await iterator.close()
   }
 
diff --git a/models/core/src/migration.ts b/models/core/src/migration.ts
index 769dab9a69..6efe17ca4c 100644
--- a/models/core/src/migration.ts
+++ b/models/core/src/migration.ts
@@ -13,13 +13,14 @@
 // limitations under the License.
 //
 
-import { saveCollaborativeDoc, takeCollaborativeDocSnapshot } from '@hcengineering/collaboration'
+import { saveCollaborativeDoc } from '@hcengineering/collaboration'
 import core, {
   DOMAIN_BLOB,
   DOMAIN_DOC_INDEX_STATE,
   DOMAIN_STATUS,
   DOMAIN_TX,
   MeasureMetricsContext,
+  RateLimiter,
   collaborativeDocParse,
   coreId,
   generateId,
@@ -188,7 +189,10 @@ async function processMigrateContentFor (
   storageAdapter: StorageAdapter,
   iterator: MigrationIterator<Doc>
 ): Promise<void> {
+  const rateLimiter = new RateLimiter(10)
+
   let processed = 0
+
   while (true) {
     const docs = await iterator.next(1000)
     if (docs === null || docs.length === 0) {
@@ -201,45 +205,36 @@ async function processMigrateContentFor (
     const operations: { filter: MigrationDocumentQuery<Doc>, update: MigrateUpdate<Doc> }[] = []
 
     for (const doc of docs) {
-      const update: MigrateUpdate<Doc> = {}
+      await rateLimiter.exec(async () => {
+        const update: MigrateUpdate<Doc> = {}
 
-      for (const attribute of attributes) {
-        const collaborativeDoc = makeCollaborativeDoc(doc._id, attribute.name, revisionId)
+        for (const attribute of attributes) {
+          const collaborativeDoc = makeCollaborativeDoc(doc._id, attribute.name, revisionId)
 
-        const value = (doc as any)[attribute.name] as string
-        if (value != null && value.startsWith('{')) {
-          const { documentId } = collaborativeDocParse(collaborativeDoc)
-          const blob = await storageAdapter.stat(ctx, client.workspaceId, documentId)
-          // only for documents not in storage
-          if (blob === undefined) {
-            const ydoc = markupToYDoc(value, attribute.name)
-            await saveCollaborativeDoc(storageAdapter, client.workspaceId, collaborativeDoc, ydoc, ctx)
-            await takeCollaborativeDocSnapshot(
-              storageAdapter,
-              client.workspaceId,
-              collaborativeDoc,
-              ydoc,
-              {
-                versionId: revisionId,
-                name: 'Migration to storage',
-                createdBy: core.account.System,
-                createdOn: Date.now()
-              },
-              ctx
-            )
+          const value = (doc as any)[attribute.name] as string
+          if (value != null && value.startsWith('{')) {
+            const { documentId } = collaborativeDocParse(collaborativeDoc)
+            const blob = await storageAdapter.stat(ctx, client.workspaceId, documentId)
+            // only for documents not in storage
+            if (blob === undefined) {
+              const ydoc = markupToYDoc(value, attribute.name)
+              await saveCollaborativeDoc(storageAdapter, client.workspaceId, collaborativeDoc, ydoc, ctx)
+            }
+
+            update[attribute.name] = collaborativeDoc
+          } else if (value == null) {
+            update[attribute.name] = makeCollaborativeDoc(doc._id, attribute.name, revisionId)
           }
-
-          update[attribute.name] = collaborativeDoc
-        } else if (value == null) {
-          update[attribute.name] = makeCollaborativeDoc(doc._id, attribute.name, revisionId)
         }
-      }
 
-      if (Object.keys(update).length > 0) {
-        operations.push({ filter: { _id: doc._id }, update })
-      }
+        if (Object.keys(update).length > 0) {
+          operations.push({ filter: { _id: doc._id }, update })
+        }
+      })
     }
 
+    await rateLimiter.waitProcessing()
+
     if (operations.length > 0) {
       await client.bulk(domain, operations)
     }