Added info to section on rollback feature.

README.md

@@ -19,7 +19,7 @@ If you want to provide json files to be loaded throught the CP. Put the files in
 The migration file is named `_master_.json` and located inside the folder with the other json files listed above. Migration files are intended to be used within a single site. They are not intended to transfer content models between websites.
 
 ## Rollback
-As of version 1.6.0, if Craft crashes with an exception, the Architect will roll back any changes that were made to the database for the operation. This should help prevent any issues that might appear from a partial import. If an exception happens please report them to on the [repo's issues](https://github.com/Pennebaker/craftcms-thearchitect/issues)
+As of version 1.6.0, if Craft crashes with an exception, the Architect will attempt to roll back any changes that were made to the database for the operation. This should help prevent any issues that might appear from a partial import. If an exception happens please report them to on the [repo's issues](https://github.com/Pennebaker/craftcms-thearchitect/issues). A backup that was created during a migration that was successfully imported will be delete. Otherwise you can find the db backup inside `craft/storage/backups`. This is in case the rollback feature doesn't restore properly. It is not recommended to rely on this auto backup/restore feature.
 
 ## JSON Schema
 The example / syntax schemas are located on the [Repo's Wiki](https://github.com/Pennebaker/craftcms-thearchitect/wiki)