Multipart Upload

In plain words: Integrating Google Drive with Salesforce allows your CRM to directly read, list, and upload files to Google Cloud storage. By authenticating via OAuth 2.0 and executing REST callouts in Apex, teams can offload heavy file storage from Salesforce, organize customer documents into Google Drive folders, and maintain real-time access right from record pages. Salesforce orgs frequently hit data and file storage limits when storing heavy contracts, collateral, and customer uploads as native ContentDocument records. Integrating directly with Google Drive via the Google Drive REST API v3 offers a cost-effective, scalable solution. This guide walks through setting up OAuth credentials in Google Cloud, structuring robust Apex callout methods, and executing multipart file uploads safely.