What are TSM and WAL files?

What are these TSM files? My folder is 915M and it is causing storage issues. Can I delete these files? What is inside them that are important?

Maybe you should try a Google search for “influx tsm wal”. You might find
https://docs.influxdata.com/influxdb/v1.7/concepts/storage_engine

Hope that helps,

Antony.