Transtron America Replaced Email Transfers with Files.com—Without Opening Fujitsu’s Network

Transtron America is the North American arm of a Fujitsu and Isuzu Motors joint venture, importing and distributing automotive electronic control units, microphones, and sensors from Dublin, Ohio.

The US operation runs lean by design. Four people handle the business, the Fujitsu parent supplies the network and VPN infrastructure, and there is no local IT function. Day-to-day operations depend on a third-party warehouse outside the company, which sends Transtron operations files on a daily and weekly cadence: customer-sensitive financial information, forecasts, and sales data. It depends on a steady flow of sensitive data from a partner, and it sits inside a corporate network that admits no outsiders.

Email Was the Only Channel the Warehouse Had

Fujitsu's internal network is reachable only over VPN, with Fujitsu credentials. The posture is strict enough that outside consultants cannot be given access to troubleshoot the company's own SAP enterprise system. There was also no external-facing FTP or SFTP infrastructure a partner could deliver into. So for a third-party warehouse that needed to send Transtron files every day, one channel existed: email.

That is what the exchange became. A person at the warehouse attached each daily and weekly file to an email and sent it by hand, customer financial data included.

The problem persisted because every obvious fix was off the table. Opening the Fujitsu network to an outside party was never an option; that is the point of the posture. The data-transfer project fell outside the parent's IT scope, and the US office had no IT team of its own to build anything. What the fix had to do was clear: live entirely outside the corporate perimeter, use credentials rather than an open channel, speak FTPS so the warehouse could push files directly, and be simple enough for a business owner to stand up and run without engineering help.

Transtron America selected Files.com to be that exchange point.

An Upload-Only Account Outside the Fujitsu Perimeter

Files.com became the external file interface the Fujitsu network could never be: a credentialed drop point sitting entirely outside the perimeter, where an outside partner can deliver and internal staff can collect.

The warehouse was provisioned as its own user on Transtron's Files.com site, with its own folder and a credential scoped to upload only. The account can deposit files and do nothing else. Transfers run one way, inbound over FTPS, using the protocol support Transtron required from the start. Files land in the warehouse's folder and sit there, and Transtron's supply chain, accounting, and finance staff retrieve them when they need them.

Nothing in the design touches the Fujitsu network. The warehouse got no VPN account, no exception was carved into the perimeter, and no server had to be stood up in a DMZ for the parent to defend. The exchange happens on infrastructure neither company has to open to the other.

Transtron built it without engineers. A supply chain manager configured the warehouse account, the folder, and the upload-only permissions using Files.com's per-user, per-folder access controls, and administers the site today. No IT department was involved on either side of the exchange.

The Manual Send Is Gone and the Network Never Opened

With the FTPS workflow in production, Transtron America retired email delivery of partner data entirely, replacing a manual exchange with a credentialed, automatic one.

• Customer financial, forecast, and sales data no longer travels as email attachments. It arrives over credentialed FTPS on the same daily and weekly cadence it always ran.
• The manual step is gone. Nobody at the warehouse composes and sends an email; the system delivers each file to the secure site automatically.
• The exchange complies with the parent's security posture with no exception in the internal network. Fujitsu's perimeter is exactly as closed as it was before.
• All of it was stood up, and is operated, by a four-person office with no IT staff.

The pattern also generalizes. The site is organized per partner, so adding another counterparty is another credential and another folder, provisioned the same way.

Outside the Perimeter, on Purpose

What changed is larger than one retired email routine. A business inside a sealed corporate network can now exchange sensitive data with an outside partner as a matter of routine, because the exchange doesn't happen on that network at all. When a locked-down network can never admit outside parties, the answer is not a hole in the perimeter but a governed exchange point outside it. Transtron America put that point on Files.com, and a supply chain manager built it alone.