adds note about size of temp location

Author: dzsquared

docs/tools/sqlpackage/sqlpackage-export.md

@@ -57,7 +57,7 @@ SqlPackage {parameters}{properties}{SQLCMD Variables}
 |**/p:**|Storage=({File|Memory} 'File')|Specifies the type of backing storage for the schema model used during extraction.|
 |**/p:**|TableData=(STRING)|Indicates the table from which data will be extracted. Specify the table name with or without the brackets surrounding the name parts in the following format: schema_name.table_identifier. This option may be specified multiple times.|
 |**/p:**|TargetEngineVersion=({Default|Latest|V11|V12} 'Latest')|Specifies what the target engine version is expected to be. This affects whether to allow objects supported by Azure SQL Database servers with V12 capabilities, such as memory-optimized tables, in the generated bacpac.|
-|**/p:**|TempDirectoryForTableData=(STRING)|Specifies the temporary directory used to buffer table data before being written to the package file.|
+|**/p:**|TempDirectoryForTableData=(STRING)|Specifies the temporary directory used to buffer table data before being written to the package file. The space required in this location may be large and is relative to the full size of the database.|
 |**/p:**|VerifyFullTextDocumentTypesSupported=(BOOLEAN)|Specifies whether the supported full-text document types for Microsoft Azure SQL Database v12 should be verified.|
 
 ## Next Steps

docs/tools/sqlpackage/troubleshooting-import-export-sqlpackage.md

@@ -51,7 +51,7 @@ For imports that contain large tables or tables with many indexes, the use of `/
 ## Export action tips
 As an alternative operation to obtain the database schema and data while skipping the schema validation, perform an [Extract](sqlpackage-extract.md) with `/p:ExtractAllTableData=True` and `/p:VerifyExtraction=True`.
 
-In scenarios where disk space is limited and runs out during the export, the use of `/p:TempDirectoryForTableData` allows the data for export to be buffered on an alternative disk. That and other properties are available to tune the [SqlPackage.exe Export](sqlpackage-export.md) operation.
+In scenarios where disk space is limited and runs out during the export, the use of `/p:TempDirectoryForTableData` allows the data for export to be buffered on an alternative disk. The space required in this location may be large and is relative to the full size of the database. That and other properties are available to tune the [SqlPackage.exe Export](sqlpackage-export.md) operation.
 
 ## Next steps