Hi,
In my product MSI, I reserve cost for the data folder with 200M, because later 
when the application running, it's likely that the application will write lots 
of data to the disk.
<Directory Id="dirCB80BB8E7C4DF6458FEC42C79CD3833C" Name="MyProductData">
        <Component Id="cmpC3EF5D274D0D1EF29832EABC636A3438" 
Guid="{B9EF5DD2-75CA-4596-A95D-785ECC65E8F5}" KeyPath="yes">
          <!--Reserve 200M for the application.-->
          <ReserveCost Id="CostForData" RunLocal="209715200" 
RunFromSource="209715200"/>
          <CreateFolder>
            <util:PermissionEx GenericAll="yes" User="[ServiceAccount]" />
          </CreateFolder>
        </Component>
</Directory>

However, by using this approach, the Add/Remove program panel shows the size of 
my product is 203M, although actually it is only using 3 M current and the 
other 200M is only reserving for future usage.

Is there any way for me to reserve the cost, but showing ARP with the real 
size? Or I should use my own cost-validation to make sure there is enough space 
for my product?

Thanks,
-Elfe

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