Increase Quota for Site Collection in SharePoint Online using PowerShell

connect-sposervice https://ajtech-admin.sharepoint.com

get-sposite -identity https://ajtech.sharepoint.com/sites/testsite

Set-SPOSite https://ajtech.sharepoint.com/sites/gp -StorageQuota 2000 -StorageQuotaWarningLevel 1500

#Check quota after increasing the size

get-sposite -identity https://ajtech.sharepoint.com/sites/gp