How to change the disk space to save chunk in local disk?Thanks

Hello, I want to save as many chunk data as possible in my local disk in order to improve the speed for query. However , it does not work.
This is the configuration file:

auth_enabled: false

server:
  http_listen_port: 3103
  http_listen_address: 0.0.0.0
  grpc_listen_port: 9097
  grpc_listen_address: 0.0.0.0
  grpc_server_max_recv_msg_size: 10000000
  grpc_server_max_send_msg_size: 10000000
  grpc_server_max_concurrent_streams: 0
  http_server_read_timeout: 5m
  http_server_idle_timeout: 7m

distributor:
  ring:
    kvstore:
      store: memberlist

ingester:
  wal:
    enabled: true
    dir: /data/netflow-8-201/wal
  lifecycler:
    ring:
      replication_factor: 1
      kvstore:
        store: memberlist
    final_sleep: 0s
  chunk_idle_period: 1h
  max_chunk_age: 1h
  chunk_retain_period: 1m
  max_transfer_retries: 0
  chunk_target_size: 4194304
  chunk_encoding: snappy

memberlist:
  join_members:
     - localhost:7948
     - localhost:7949

  bind_port: 7948
  bind_addr: ['0.0.0.0']


  max_join_backoff: 1m
  max_join_retries: 10
  min_join_backoff: 1s

schema_config:
  configs:
  - from: 2022-09-26
    store: boltdb-shipper
    object_store: iharbor
    schema: v11
    index:
      prefix: netflow_
      period: 24h

storage_config:
  boltdb_shipper:
      active_index_directory: /data/netflow-8-201/loki/boltdb-shipper-active
      cache_location: /data/netflow-8-201/loki/boltdb-shipper-cache
      cache_ttl: 168h # Can be increased for faster performance over longer query periods, uses more disk space
      shared_store: harbor
  harbor:
      bucket_name: netflow-8-201
      endpoint: 111.1.1.1
      token: 21867fccde9
      insecure: true
  index_queries_cache_config:
    redis:
      endpoint: localhost:6379
      expiration: 1h
  boltdb:
    directory: /data/netflow-8-201/loki/boltdb
  filesystem:
    directory: /data/netflow-8-201/loki/filesystem

limits_config:
  enforce_metric_name: false
  reject_old_samples: true
  reject_old_samples_max_age: 168h
  ingestion_rate_mb: 128
  ingestion_burst_size_mb: 256
  max_entries_limit_per_query: 50000
  split_queries_by_interval: 1m
  max_query_parallelism: 100

chunk_store_config:
  max_look_back_period: 0
  chunk_cache_config:
    redis:
      endpoint: localhost:6379
      expiration: 1h
  write_dedupe_cache_config:
   redis:
      endpoint: localhost:6379
      expiration: 1h

I think that it should be many files in /data/netflow-8-135/wal directory. However , it does not at all. There always only about several file left.
Can anyone help me to solve this problem? Thanks very much.
Best wishes.