---
id: data-transfers.a-transfer-failed-what-now
url: https://storagestudio.us/faq/data-transfers/a-transfer-failed-what-now
category: "Data Transfers"
subcategory: "Problems and messages"
question: "A transfer failed — how do I find out why and try again?"
alt_questions:
  - "transfer failed storage studio"
  - "retry a failed transfer"
  - "sync failed what do I do"
  - "Failed status on transfer"
  - "how to rerun a failed copy"
  - "upload failed to cloud mac app"
short_answer: "Select it to read the plain-English reason and the log. Fix the cause, then set up the same transfer again — only missing or changed files are sent, so nothing that already arrived is repeated."
tags: ["failed", "retry", "troubleshooting"]
related: ["https://storagestudio.us/faq/data-transfers/where-is-the-transfer-log", "https://storagestudio.us/faq/data-transfers/why-is-a-repeat-transfer-faster", "https://storagestudio.us/faq/data-transfers/account-needs-signing-in-again"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# A transfer failed — how do I find out why and try again?

Select the failed transfer in Data Transfers. The detail pane shows a red-tinted message explaining what went wrong in plain English, and the **Log** card shows the last lines of output.

To try again, fix the cause (reconnect the drive, sign in to the account again, free some space), then set up the same transfer with **New Transfer**. It only sends what's missing or changed, so files that already arrived aren't sent twice. Remove the failed entry when you're done.

The usual causes are a drive that was unplugged, a dropped connection, an account whose sign-in has expired, or a full destination.

Related: [Where is the transfer log?](https://storagestudio.us/faq/data-transfers/where-is-the-transfer-log) · [Troubleshooting](https://storagestudio.us/faq/troubleshooting/)