Hi, before uploaded your photos, you can remove watermark firstly.
To remove watermark on photo, you can use Photoshop, but Photoshop occupies a lot of memory space in the computer. If you are looking for a lightweight app to remove watermarks from images, I suggest you use UkeySoft Photo Watermark Remover, which is a lightweight and powerful photo watermark remover, as well as image watermark adding tool.