Personally I would never ever upload to a third party valuable and personal family records.
Develop a simple storage system on your home PC that does not rely on more than the operating system and the inbuilt file explorer app.
My system is on a portable hard drive (SSD) and there are multiple exact copies on additional devices. The SSD is transferrable to any Windows PC or Mac and easily read by using the inbuilt File Manager/Explorer programmes that are standard within the operating system.
When I get to the stage of “enough is enough” I am going to distribute copies of the digital archive via USB storage devices to Cousins and Nephews, Nieces.