What are sender-key & session-** files?

[bobftool]

I have this as my sock:

const { state, saveCreds } = await useMultiFileAuthState('baileys_auth_info')

const sock = makeWASocket({ defaultQueryTimeoutMs: undefined, printQRInTerminal: true, auth: { creds: state.creds, /** caching makes the store faster to send/recv messages */ keys: makeCacheableSignalKeyStore(state.keys, logger), }, generateHighQualityLinkPreview: true })

And everytime someone sends a message to the bot or a group it creates a file in baileys_auth_info folder with the phone number of the sender included in the name of that file.

I want to know what is causing this and how to disable it, because I don't want to fill up disk space with all these files.

[Riders004]

It's a session file for user those who are chatted with you