It's not recommended to use in production due to low capacity capabilities on most file systems.
But if you're sure in your file-system or data amount is small it may be useful for you as haves a faster speed of Value removal.
Hold Values in flat FileSystem files. path property points to root directory in order to store files
<value-storage id="Storage #1" class="org.exoplatform.services.jcr.impl.storage.value.fs.SimpleFileValueStorage">
<properties>
<property name="path" value="data/values"/>
</properties>
<filters>
<filter property-type="Binary" min-value-size="1M"/>
</filters>