Unable to locate private key when setting up Filezilla (Windows)

Beginner here. I’m setting up Filezilla to connect with my Droplet and am following the tutorial below to set up.

https://www.digitalocean.com/community/tutorials/how-to-use-filezilla-to-transfer-and-manage-files-securely-on-your-vps

I’m able to SSH to my Droplet no problem and have used bash to see i have both private and public keys in the ssh directory

I head to Edit -> Settings -> SFTP -> Add key file but can not find the id_rsa key under the .ssh directory

I try authorizing through Site Manager by using server log ins and see this

Status: Server refused our key Error: FATAL ERROR: No supported authentication methods available (server sent: publickey)

I tried converting to ppk format with Putty but again am unable to find the key files when I try to load keys.

I’m sure I’m missing something obvious. Thanks in advance for any advice on this.