I tried to upload my SQL files to TiDB Cluster via tidb-lightning.toml, and here is the result of my nohup.out:
tiup is checking updates for component tidb-lightning ...
Starting component `tidb-lightning`: /tidb-lightning/v7.0.0/tidb-lightning -config tidb-lightning.toml
Verbose debug logs will be written to tidb-lightning.log
tidb lightning encountered error: [Lightning:Storage:ErrStorageUnknown]list file failed: open /mnt/c/System Volume Information: permission denied
Look like tidb lightning try to use
/mnt/c/Systemas its storage but permission denied, so you can resolve the permission about/mnt/c/System, orchange tidb-lightning.toml to use another path as tidb lighning storage.