diff --git a/doc/047_tuning_backup_parameters.rst b/doc/047_tuning_backup_parameters.rst
index 38814d1af..a972e9ebd 100644
--- a/doc/047_tuning_backup_parameters.rst
+++ b/doc/047_tuning_backup_parameters.rst
@@ -72,3 +72,9 @@ of backend connections plus one. For example, if the backend uses 5 connections
 for most backends), with a target pack size of 64 MiB, you'll need a *minimum* of 384 MiB
 of space in the temp directory. A bit of tuning may be required to strike a balance between
 resource usage at the backup client and the number of pack files in the repository.
+
+Note that larger pack files increase the chance that the temporary pack files are written
+to disk. An operating system usually caches file write operations in memory and writes
+them to disk after a short delay. As larger pack files take longer to upload, this
+increases the chance of these files being written to disk. This can increase disk wear
+for SSDs.