Clarify object storage limits for Quobyte and Ceph

Author: laurafuchs

user/pages/04.Reference/05.object-storage/01.known-issues/docs.en.md

@@ -42,7 +42,10 @@ The value of 52428800 Bytes = 50 GiB specified in this example is actually the d
 ### Maximum number of objects
 
 **Problem Statement:**
-There is a technical limitation in the backend storage of SEOS of 200 million objects or directories per project per region.
+There is a technical limitation in the backend storage of SEOS, depending on the storage type:
+
+- **Quobyte**: Limited to **200 million objects or directories** per project per region.
+- **Ceph**: Limited to 100 million objects or directories per bucket, per region. However, there is no object limit per project, meaning that projects can have multiple buckets, each subject to the per-bucket limit mentioned above.
 
 **Solutions:**
 Please contact our customer support if you run into (or think you may run into) this limitation.