diff --git a/dev/tool/src/storage.ts b/dev/tool/src/storage.ts
index 7cd974d9a7..394cc4729f 100644
--- a/dev/tool/src/storage.ts
+++ b/dev/tool/src/storage.ts
@@ -14,9 +14,9 @@
 //
 
 import { type Attachment } from '@hcengineering/attachment'
-import { type Blob, type MeasureContext, type WorkspaceId, RateLimiter } from '@hcengineering/core'
+import { type Blob, type MeasureContext, type Ref, type WorkspaceId, RateLimiter } from '@hcengineering/core'
 import { DOMAIN_ATTACHMENT } from '@hcengineering/model-attachment'
-import { type StorageAdapter, type StorageAdapterEx } from '@hcengineering/server-core'
+import { type ListBlobResult, type StorageAdapter, type StorageAdapterEx } from '@hcengineering/server-core'
 import { type Db } from 'mongodb'
 import { PassThrough } from 'stream'
 
@@ -143,6 +143,20 @@ async function processAdapter (
 
   const iterator = await source.listStream(ctx, workspaceId)
 
+  const targetIterator = await target.listStream(ctx, workspaceId)
+
+  const targetBlobs = new Map<Ref<Blob>, ListBlobResult>()
+
+  while (true) {
+    const part = await targetIterator.next()
+    for (const p of part) {
+      targetBlobs.set(p._id, p)
+    }
+    if (part.length === 0) {
+      break
+    }
+  }
+
   const toRemove: string[] = []
   try {
     while (true) {
@@ -150,18 +164,18 @@ async function processAdapter (
       if (dataBulk.length === 0) break
 
       for (const data of dataBulk) {
-        let targetBlob = await target.stat(ctx, workspaceId, data._id)
-        const sourceBlob = await source.stat(ctx, workspaceId, data._id)
-
-        if (sourceBlob === undefined) {
-          console.error('blob not found', data._id)
-          continue
-        }
+        let targetBlob: Blob | ListBlobResult | undefined = targetBlobs.get(data._id)
         if (targetBlob !== undefined) {
-          console.log('Target blob already exists', targetBlob._id, targetBlob.contentType)
+          console.log('Target blob already exists', targetBlob._id)
         }
 
         if (targetBlob === undefined) {
+          const sourceBlob = await source.stat(ctx, workspaceId, data._id)
+
+          if (sourceBlob === undefined) {
+            console.error('blob not found', data._id)
+            continue
+          }
           await rateLimiter.exec(async () => {
             try {
               await retryOnFailure(
@@ -170,7 +184,12 @@ async function processAdapter (
                 async () => {
                   await processFile(ctx, source, target, workspaceId, sourceBlob)
                   // We need to sync and update aggregator table for now.
-                  await exAdapter.syncBlobFromStorage(ctx, workspaceId, sourceBlob._id, exAdapter.defaultAdapter)
+                  targetBlob = await exAdapter.syncBlobFromStorage(
+                    ctx,
+                    workspaceId,
+                    sourceBlob._id,
+                    exAdapter.defaultAdapter
+                  )
                 },
                 50
               )
@@ -181,23 +200,14 @@ async function processAdapter (
               console.error('failed to process blob', data._id, err)
             }
           })
-        }
 
-        if (targetBlob === undefined) {
-          targetBlob = await target.stat(ctx, workspaceId, data._id)
+          if (targetBlob !== undefined && 'size' in targetBlob && (targetBlob as Blob).size === sourceBlob.size) {
+            // We could safely delete source blob
+            toRemove.push(sourceBlob._id)
+          }
+          processedBytes += sourceBlob.size
         }
-
-        if (
-          targetBlob !== undefined &&
-          targetBlob.size === sourceBlob.size &&
-          targetBlob.contentType === sourceBlob.contentType
-        ) {
-          // We could safely delete source blob
-          toRemove.push(sourceBlob._id)
-        }
-
         processedCnt += 1
-        processedBytes += sourceBlob.size
 
         if (processedCnt % 100 === 0) {
           await rateLimiter.waitProcessing()
diff --git a/packages/storage/src/index.ts b/packages/storage/src/index.ts
index 5a1a850d42..4390e23f75 100644
--- a/packages/storage/src/index.ts
+++ b/packages/storage/src/index.ts
@@ -14,6 +14,7 @@
 //
 
 import { type Blob, type MeasureContext, type StorageIterator, type WorkspaceId } from '@hcengineering/core'
+import { PlatformError, unknownError } from '@hcengineering/platform'
 import { type Readable } from 'stream'
 
 export type ListBlobResult = Omit<Blob, 'contentType' | 'version'>
@@ -77,7 +78,7 @@ export interface StorageAdapterEx extends StorageAdapter {
     workspaceId: WorkspaceId,
     objectName: string,
     provider?: string
-  ) => Promise<void>
+  ) => Promise<Blob>
 
   find: (ctx: MeasureContext, workspaceId: WorkspaceId) => StorageIterator
 }
@@ -87,7 +88,9 @@ export interface StorageAdapterEx extends StorageAdapter {
  */
 export class DummyStorageAdapter implements StorageAdapter, StorageAdapterEx {
   defaultAdapter: string = ''
-  async syncBlobFromStorage (ctx: MeasureContext, workspaceId: WorkspaceId, objectName: string): Promise<void> {}
+  async syncBlobFromStorage (ctx: MeasureContext, workspaceId: WorkspaceId, objectName: string): Promise<Blob> {
+    throw new PlatformError(unknownError('Method not implemented'))
+  }
 
   async initialize (ctx: MeasureContext, workspaceId: WorkspaceId): Promise<void> {}
 
diff --git a/server/s3/src/index.ts b/server/s3/src/index.ts
index 1314ebd98e..9eaacc2440 100644
--- a/server/s3/src/index.ts
+++ b/server/s3/src/index.ts
@@ -299,7 +299,7 @@ export class S3Service implements StorageAdapter {
         version: result.VersionId ?? null
       }
     } catch (err: any) {
-      ctx.error('no object found', { error: err, objectName, workspaceId: workspaceId.name })
+      ctx.warn('no object found', { error: err, objectName, workspaceId: workspaceId.name })
     }
   }
 
diff --git a/server/server-storage/src/aggregator.ts b/server/server-storage/src/aggregator.ts
index b17b63a43c..7ad1c60b0b 100644
--- a/server/server-storage/src/aggregator.ts
+++ b/server/server-storage/src/aggregator.ts
@@ -51,7 +51,7 @@ export class AggregatorStorageAdapter implements StorageAdapter, StorageAdapterE
     workspaceId: WorkspaceId,
     objectName: string,
     providerId?: string
-  ): Promise<void> {
+  ): Promise<Blob> {
     let current: Blob | undefined = (
       await this.dbAdapter.find<Blob>(ctx, workspaceId, DOMAIN_BLOB, { _id: objectName as Ref<Blob> }, { limit: 1 })
     ).shift()
@@ -74,6 +74,9 @@ export class AggregatorStorageAdapter implements StorageAdapter, StorageAdapterE
       }
       await this.dbAdapter.upload<Blob>(ctx, workspaceId, DOMAIN_BLOB, [stat])
       // TODO:  We need to send notification about Blob is changed.
+      return stat
+    } else {
+      throw new NoSuchKeyError('No such blob found')
     }
   }