compact Flash several sizes

I was attemopting to read my older compact flash card from my canon E When going bach to camera now the camera giives me a card  errorOS 30D to a windows 10 laptop.  The cards could be read on thecamera but when plased in a sansdisk multicaard reader the computer says files are corrupt.,  When I go back to the camera it now says I have a card error.  Four cards same result on all

1GB ultraII

4GB extreme III

8GB extreme III

32GB Transcend

I dont think all 4 failed at the same time.