> For the complete documentation index, see [llms.txt](https://docs.mithril.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mithril.ai/compute-and-storage/persistent-storage.md).

# Persistent storage

{% hint style="info" %}
Storage pricing can be found at [mithril.ai/pricing](https://mithril.ai/pricing). Mithril does not charge for ingress, egress, or network bandwidth.
{% endhint %}

While each instance comes with its own ephemeral storage (see details in [Instance types & specifications](/compute-and-storage/instance-types-and-specifications.md)), persistent storage provides a more reliable solution for storing critical, long-lived data and is preferable in cases where:

* You would otherwise pay significant egress costs to consistently stream data from a third-party provider.
* Your workloads would be accelerated by colocating your data.
* You are running training workloads on spot instances and need to checkpoint to mitigate the risk of preemption.

Mithril offers two options for persistent storage:

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>File shares</strong></td><td></td><td>File share storage provides you with a preformatted disk for file storage. This option is best for most use cases.</td><td><a href="/pages/RdprnL0Yl6B4vLsfAyjc">/pages/RdprnL0Yl6B4vLsfAyjc</a></td></tr><tr><td><strong>Block storage</strong></td><td></td><td>Block storage is an advanced option which provides you with a raw disk volume, giving you complete control over the filesystem.</td><td><a href="/pages/ARzw2YePZXNz7DMDVBC9">/pages/ARzw2YePZXNz7DMDVBC9</a></td></tr></tbody></table>


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