recommendation for solid backup for personal documents (very few photo/videos)

hi, I have ~1G of personal documents that include all documents that I wrote/edited since high school. Most of them are docx/pptx/txt/markdown/pdf, and mostly text with a small fraction of pictures. I wonder if there is a rock solid backup against almost all possible corrupt in my data files? There are not large files (very few photos/videos) so I do not mind using 10x storage space (with huge redundancy to protect against any corruption) to back up data. Any ideas?