(This review is on the stick I received which may be a fake) The stick is far too tight, requiring excess force to push into the USB port. It failed to fill past the 4GB point. When it did the stick failed making the data inaccessible. It has all the hallmarks of a fake stick, a low end 4GB chip hacked to read as 64GB. There was no SanDisk software loaded by default, a good sign of a fake stick and the product code has a sticker over it, some early fakes had an incorrect product code. The device also felt flimsy and cheap, not what I expect from SanDisk.