Manually set the export file size. Ps will save some data after editing the picture, so the saved file will be larger than the source file. If the picture size meets the requirements, you need to set the export size manually. The specific steps are as follows.

1. Open the picture to edit, click the File button, and click Export in the menu.

2. In the Export drop-down menu, click the old version format saved for the web.

3. Set jpkg low maximum compressed picture size in the preset of the setting interface.

4. Adjust the quality level in quality until the picture storage size meets the requirements.