8 GB Cruzer Always Corrupting Files

I have quite a very similar problem with my sandisk cruzer blade 4GB flash. It corrupts everything I put on it. Only about the first 96MB or so is able to hold valid data - and that’s only sometimes. Anything beyond this size gets corrupt and useless. When I ran sandisk secure access 2.0 which I copied from a similar flash drive on my computer. It alerts me saying that there is no sandisk flash drive on the computer. Could someone, anybody be so kind as to look into this. If there is a solution of any kind, please let us have it. I would have attached a currpted sample in rar file but I couldn’t. Thanks in advance.