diff --git a/app/src/standard/kotlin/com/infomaniak/auth/backup/BlockStoreBackup.kt b/app/src/standard/kotlin/com/infomaniak/auth/backup/BlockStoreBackup.kt
index 43df1ebe..2a999ffd 100644
--- a/app/src/standard/kotlin/com/infomaniak/auth/backup/BlockStoreBackup.kt
+++ b/app/src/standard/kotlin/com/infomaniak/auth/backup/BlockStoreBackup.kt
@@ -26,6 +26,7 @@ import com.google.android.gms.auth.blockstore.StoreBytesData
 import com.infomaniak.core.common.cancellable
 import com.infomaniak.core.sentry.SentryLog
 import com.infomaniak.multiplatform_authenticator.core.PasskeysStorageLocation
+import io.sentry.Sentry
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.invoke
 import kotlinx.coroutines.tasks.await
@@ -98,6 +99,7 @@ object BlockStoreBackup {
             .build()
         val bytes = blockstoreClient.retrieveBytes(retrieveRequest).await().blockstoreDataMap[PASSKEYS_KEY]?.bytes
             ?: return null
+        Sentry.addBreadcrumb("readPasskeysBackup(): Trying to decode ${bytes.size} bytes")
         return ProtoBuf.decodeFromByteArray(bytes)
     }