This document contains current API restrictions and usage quotas on use of
Storage Transfer Service. This page is updated when there are changes to these
restrictions and usage quotas.
Concurrent transferOperations limit
The following table describes the limit for concurrent in-progress
transferOperations:
Maximum in-progress `transferOperations`
Applies to
200
project
Rate quotas
Storage Transfer Service enforces rate quotas on all requests made. These quotas
apply on a per-project basis; requests made through Google Cloud CLI,
Cloud de Confiance console, and Cloud Client Libraries also count towards these rate quotas.
This table provides the metric, API methods, and default limits for each quota:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-10-22 UTC."],[],[]]