Azcopy copy Usage For Azure file shares

Hi all,

I am trying to copy my file share from one storage account to another for DR use case by running following commands:

## 1. Generate Account Key for src  
source_storage_key =$(az storage account keys list -g <rg> -n <src-storage> --query "[0].value" -o tsv) 


## 2. Create snapshot with timestamp of Source File share for PITR
SNAPSHOT_TIMESTAMP=$(az storage share snapshot \
  --account-name  <acc_name>\
  --account-key  $source_storage_key \
  --name <file_share> \
  --query snapshot -o tsv) 


## 3. Generate SAS for snapshot
  
SRC_SAS=$(az storage share generate-sas \
  --account-name  <acc_name> \
  --account-key $source_storage_key \
  --name <file_share> \
  --permissions rl \
  --expiry $(date -u -d "1 day" '+%Y-%m-%dT%H:%MZ') \
  --https-only \
  -o tsv)

# 4. Get destination storage account key & generate SAS
dest_key=$(az storage account keys list -g <dest-rg> -n <dest-storage> --query "[0].value" -o tsv)

dest_sas=$(az storage share generate-sas -n <dest-share> --account-name <dest-storage> --account-key "$dest_key" --permissions rwl --expiry $(date -u -d "+1 day" '+%Y-%m-%dT%H:%MZ') -o tsv)


# 5. Construct URLs
source_snapshot_url="https://<src-storage>.file.core.windows.net/<src-share>?snapshot=${SNAPSHOT_TIMESTAMP}&${SRC_SAS}"
dest_url="https://<dest-storage>.file.core.windows.net/<dest-share>?$dest_sas"

# 6. AzCopy copy
azcopy copy "$source_snapshot_url" "$dest_url" --recursive --preserve-smb-info --preserve-smb-permissions

Now, if I run azcopy copy with just --recursive flag, my copy is working fine.

But, when I passed these smb flags --preserve-smb-* I started seeing issues.

Getting following error:

Response Details: <Code>InvalidQueryParameterValue</Code><Message>Value for one of the query parameters specified in the request URI is invalid. </Message><QueryParameterName>snapshot</QueryParameterName><QueryParameterValue>2025-07-03T00:03:42.0000000Z</QueryParameterValue><Reason>This operation is only allowed on the root blob. Snapshot should not be provided.</Reason>

Any help on this is would be great.

Thanks