In ERP projects, document attachments often become a blind spot: they take up space, slow down the system and complicate administration.
Until recently, Business Central stored files directly within the environment, which could affect performance and increase cloud storage costs.
The new External Storage capability changes that paradigm.
It allows attachments to be stored outside the main environment, maintaining traceability and access from Business Central while freeing the system from the physical weight of the files.
1. What external storage solves
Internal document storage typically faces three recurring challenges:
Limited space — large attachments quickly consume capacity.
Performance impact — every stored file adds load to the environment.
Cost — more space means higher infrastructure costs.
External Storage addresses all three with a simple, elegant approach:
keep the reference inside the ERP, but move the file outside.
2. How it works
You can configure an external storage provider (Azure Blob, SharePoint, OneDrive or any compatible service) and link it to Business Central entities.
When a user attaches a document:
the file is saved in the external repository
Business Central retains the link and metadata
access remains seamless for the user
From the interface, the experience is identical — users open, download or view documents as usual.
Behind the scenes, the ERP stays lighter and more efficient.
3. Benefits for architecture and governance
✔ Operational efficiency
Less load on the main environment, better overall performance.
✔ Scalability
Document volume can grow without compromising system stability.
✔ Security and compliance
External repositories allow advanced access, encryption and audit policies.
✔ Cost optimisation
External storage is typically more flexible and cost‑effective than internal SaaS space.
✔ Clear governance
Separating transactional data from physical files improves traceability and risk management.
4. Real impact on projects
For architects and consultants, this functionality brings tangible improvements to solution design:
simpler environment administration
fewer incidents caused by space saturation
smoother user experience
easier audits and compliance management
In projects with high document volume — invoices, contracts, purchase orders, reports — the change translates into greater stability and lower operational cost.
5. What it means for the future of ERP
External Storage is not just a technical enhancement.
It’s a step towards a more modular architecture, where Business Central acts as the core for processes and data, while files live in specialised repositories.
This separation between structured data and document data is key to the evolution of modern ERP:
more agile, more secure and better prepared for integration with other platforms.
To Conclude
External Storage redefines how Business Central manages attachments.
It’s not only about freeing space — it’s about gaining efficiency, security and control.
For those designing enterprise solutions, this capability opens the door to a cleaner, more sustainable and scalable architecture.
