Using received file data without saving the file anywhere

Hello to everyone.
I am sorry if this question have done again.
I was intending to find out if i can use multer to upload a file in a host without saving the file in my nodejs server. For now it works due after im sending file to host i delete it with fs from its filepath but feels like its extra work for server.
I did read somewhere that i can make my own storage engine that doesn save data anywhere but couldn't wrap it around my head.