diff --git a/src/backup/journey.test.ts b/src/backup/journey.test.ts
index 6d7d9f8c..8e40d5b1 100644
--- a/src/backup/journey.test.ts
+++ b/src/backup/journey.test.ts
@@ -693,7 +693,6 @@ describe('creates backup with valid compression config values', () => {
       .withWaitForCompletion(true)
       .withConfig({
         CPUPercentage: 80,
-        ChunkSize: 512,
         CompressionLevel: 'BestSpeed',
       })
       .do()
@@ -754,44 +753,6 @@ describe('fails creating backup with invalid compression config', () => {
       });
   });
 
-  it('fails creating backup with ChunkSize too high', () => {
-    return client.backup
-      .creator()
-      .withIncludeClassNames(PIZZA_CLASS_NAME)
-      .withBackend(BACKEND)
-      .withBackupId(BACKUP_ID)
-      .withConfig({
-        ChunkSize: 513, // Max is 512
-      })
-      .do()
-      .then(() => {
-        throw new Error('should fail on create backup');
-      })
-      .catch((err: Error) => {
-        expect(err.message).toContain('422');
-        expect(err.message).toContain('ChunkSize');
-      });
-  });
-
-  it('fails creating backup with ChunkSize too low', () => {
-    return client.backup
-      .creator()
-      .withIncludeClassNames(PIZZA_CLASS_NAME)
-      .withBackend(BACKEND)
-      .withBackupId(BACKUP_ID)
-      .withConfig({
-        ChunkSize: 1, // Min is 2
-      })
-      .do()
-      .then(() => {
-        throw new Error('should fail on create backup');
-      })
-      .catch((err: Error) => {
-        expect(err.message).toContain('422');
-        expect(err.message).toContain('ChunkSize');
-      });
-  });
-
   it('cleans up', () => cleanupTestFood(client));
 });
 
diff --git a/src/collections/backup/client.ts b/src/collections/backup/client.ts
index 54f0503e..8f4f6bf4 100644
--- a/src/collections/backup/client.ts
+++ b/src/collections/backup/client.ts
@@ -118,7 +118,6 @@ export const backup = (connection: Connection): Backup => {
       }
       if (args.config) {
         builder = builder.withConfig({
-          ChunkSize: args.config.chunkSize,
           CompressionLevel: args.config.compressionLevel,
           CPUPercentage: args.config.cpuPercentage,
         });
diff --git a/src/collections/backup/types.ts b/src/collections/backup/types.ts
index f24bc8d8..f92ef188 100644
--- a/src/collections/backup/types.ts
+++ b/src/collections/backup/types.ts
@@ -31,7 +31,7 @@ export type BackupReturn = BackupStatusReturn & {
 
 /** Configuration options available when creating a backup */
 export type BackupConfigCreate = {
-  /** The size of the chunks to use for the backup. */
+  /** Deprecated: This parameter no longer has any effect. (The size of the chunks to use for the backup.) */
   chunkSize?: number;
   /** The standard of compression to use for the backup. */
   compressionLevel?: BackupCompressionLevel;