GCP - Service Account Limits & Restrictions

[amjiddader]

Hello, 

I have few questions on Google Service Accounts,  specially using (Drive) storage of an SA, so Its unclear and also not mentioned anywhere (clearly), 

Approch: Create a project, create 10 Service Accounts, So technically we will have 150GB storage now.

Now, I want to know, can i use this storage to store personal files i.e documents using api ( I will create simple web based file manager) Using all 10 SA we will pick random sa to download/preview files. Same goes for Uploading. 

So, Will google allow me to use 150GB of such storage? If NO, Where does Google specifically mentioned that we can not use Google Cloud > Service Accounts> Drive Storage to store files.