Azure Blob Storage vs SharePoint for sharing files with partners

Your partners need files, and your organization already pays for Microsoft 365 and Azure. Should the files go into a SharePoint site with external sharing, or stay in Azure Blob Storage? This guide compares Azure Blob Storage vs SharePoint for sharing files with people outside your organization, and shows which one fits which case.

Short answer: SharePoint is built for documents people edit together: Office files, co-authoring, versions and guest sharing are native. Azure Blob Storage is built for volume and data produced by applications: very large files, terabytes of exports, media or archives, at a lower cost per GB. Its weak point is the human side: partners need a SAS URL or Azure tools to reach the files, unless you add a sharing layer on top.

Azure Blob Storage vs SharePoint at a glance

Limits are from the SharePoint limits and Blob Storage scalability targets pages, as checked in November 2026.

File size and volume

SharePoint accepts files up to 250 GB per upload, and the ZIP generated when someone downloads several files at once is limited to 20 GB. Sync is recommended for no more than 300,000 files per library. These limits are high for documents, but they matter for media libraries, data exports or backups.

Azure Blob Storage was designed for this kind of content. A block blob can reach about 190.7 TiB, and a container can grow to the capacity of the storage account. If your partners exchange video rushes, CAD models, datasets or database exports, the files often already live in Blob Storage because an application or a pipeline wrote them there.

Storage cost

The two services are paid in completely different ways:

• SharePoint storage is pooled for the organization: 1 TB plus 10 GB per license purchased. Beyond that, you buy extra storage per GB per month. It is convenient for documents, expensive for terabytes of media.
• Azure Blob Storage is billed per GB stored per month, with hot, cool, cold and archive access tiers, plus transactions and outbound data transfer when partners download files. Check the Blob Storage pricing page for your region.

For large, rarely changed volumes, Blob Storage with a cool or cold tier usually costs less. For a few hundred gigabytes of documents, the storage already included in Microsoft 365 is often enough.

Sharing with people outside your organization

SharePoint has external sharing built in. An administrator sets the level in the SharePoint admin center, from Anyone links to New and existing guests or Only people in your organization, as described in Manage sharing settings. You can force Anyone links to expire, limit them to view permission, restrict sharing to some domains, and make guest access expire after a number of days. Guests open files in a browser they already know.

Azure Blob Storage has no end-user sharing screen. The native options are:

1. A SAS URL with permissions and an expiry. It works for whoever has the link, and stopping it early depends on how it was signed; see how to revoke a SAS token.
2. A Microsoft Entra B2B guest with a Storage Blob Data role on the container. It is named and governed, but the partner then works in the Azure portal or Azure Storage Explorer, tools designed for administrators.

Our guide on sharing an Azure Blob container with an external partner details each method step by step.

Audit: who opened or downloaded what

In SharePoint, file and sharing activities can be searched in the Microsoft Purview audit log, and site owners can show who viewed a file.

In Azure Blob Storage, you enable resource logs and query them in Azure Monitor. With Microsoft Entra ID, each request carries the caller identity. With a SAS URL, the log shows that a token was used, not which person used it.

When SharePoint is the right choice

• Partners edit Office documents with you, comment and co-author.
• Files are documents, not data: contracts, presentations, project folders.
• Your volume fits comfortably in the storage included with your licenses.
• You want guests to manage everything in a familiar Microsoft 365 experience.

When Azure Blob Storage is the right choice

• Files are large or numerous: media, exports, backups, datasets.
• The files are produced or consumed by applications, and copying them into SharePoint would mean a second copy to synchronize.
• You need access tiers and lifecycle rules to control cost over years.
• Your security team prefers to keep the data in your Azure subscription, under your Azure policies, network rules and region.

Many organizations use both: SharePoint for working documents, Blob Storage for data and large deliveries.

Blob Web Explorer: the sharing layer Blob Storage does not have

If the files belong in Azure Blob Storage but the people who need them are business users or partners, Blob Web Explorer, governed access and collaboration for Azure Blob Storage, adds the missing human side without moving the files:

• Share a container by email with Read or Read and Write access, a validity period and an optional reason; disable one recipient at any time.
• No SAS URL or key sent to anyone: recipients sign in and work in a browser, without an Azure role.
• Activity attributed to a person, with CSV export, for "who downloaded this file?".
• Files stay in your containers: nothing is copied into another platform.
• Large files: uploads up to 195 GiB per file with Enterprise, which adds Microsoft Entra ID sign-in and roles from your tenant.

It works alongside SharePoint, the Azure portal and Azure Storage Explorer. Plans are on the pricing page, and the access model is described on the security page.

Bottom line

Choosing between Azure Blob Storage vs SharePoint is mostly a question of content: documents people edit together belong in SharePoint, large files and application data belong in Blob Storage. When those Blob files must reach partners and business teams, add a sharing layer instead of copying them elsewhere.

Start free with Blob Web Explorer and share your first container in minutes.

Frequently asked questions