question

Hi @GalOfer-7756,

You're right. import {Client, OneDriveLargeFileUploadTask} from "@microsoft/microsoft-graph-client" works.

Did you mean initialize client in @microsoft/microsoft-graph-client?

 import { Client } from "@microsoft/microsoft-graph-client";
    
 const options = {
     authProvider, // An instance created from previous step
 };
 const client = Client.initWithMiddleware(options);

You could refer to the below articles for more：
https://github.com/microsoftgraph/msgraph-sdk-javascript/blob/HEAD/docs/CreatingClientInstance.md
https://www.npmjs.com/package/@microsoft/microsoft-graph-client

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Hi @GalOfer-7756,

Usually, we instantiate MSGraphClient object from SharePoint context like this:

  import { MSGraphClient } from '@microsoft/sp-http';
    
  const msGraphClient=this.context.msGraphClientFactory.getClient();

However, you are using const uploadTask: OneDriveLargeFileUploadTask = await OneDriveLargeFileUploadTask.create(client, file, options);. The Client instance in the code is different from msGraphClient instance .

You have to instantiate a Client object as I mentioned above, below is my sample code:

First, npm install msal

Then:

 import { UserAgentApplication } from "msal";
    
 import { ImplicitMSALAuthenticationProvider } from "@microsoft/microsoft-graph-client/lib/src/ImplicitMSALAuthenticationProvider";
 import { MSALAuthenticationProviderOptions } from '@microsoft/microsoft-graph-client/lib/src/MSALAuthenticationProviderOptions';
 import {Client, OneDriveLargeFileUploadTask} from "@microsoft/microsoft-graph-client";
    
 const msalConfig = {
         auth: {
           clientId: "your_client_id", // Client Id of the registered application
           redirectUri: "your_redirect_uri",
         },
       };
       const graphScopes = ["user.read", "mail.send"]; // An array of graph scopes
          
       // Important Note: This library implements loginPopup and acquireTokenPopup flow, remember this while initializing the msal
       // Initialize the MSAL @see https://github.com/AzureAD/microsoft-authentication-library-for-js#1-instantiate-the-useragentapplication
       const msalApplication = new UserAgentApplication(msalConfig);
       const options = new MSALAuthenticationProviderOptions(graphScopes);
       const authProvider = new ImplicitMSALAuthenticationProvider(msalApplication, options);
       const client = Client.initWithMiddleware({
         debugLogging: true,
         authProvider: authProvider,
       });