Problem viewing PDF files on read only USB drives.
Bug Report:
I am distributing pdf files on USB drives that are locked for read only at the hardware level. Until about 6 months ago, I was able to do this with PDF files. Now, when I try to open a pdf file on a locked drive, I get an error that the file is corrupted. I can unlock the drive and then the file can be viewed without issue in Reader or Acrobat. I see this bug using two different manufacturers USB drives. It also reproduces using pdf/a files rather than standard pdf files. Marking the pdf file as read only doesn't help either. And as I mentioned, earlier versions of reader (up to about 6 months ago) work fine under these same conditions.
If you need any more information or hardware samples to test, please contact me!
Keith Nagel
shared this idea
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Hitoshi Ozeki
commented
I am in trouble, too...
I use USB memories that has a write-protect switch. for preventing from malware infection.but Acrobat Reader cannot open .pdf file from protected USB memory. useless.
example of USB memories that has a write-protect switch:
https://www.buffalo.jp/product/detail/ruf3-c64g-bk.html
https://www.amazon.co.jp/dp/B00CWR333Ahttps://www.buffalo.jp/product/detail/ruf3-c64ga-bk.html
https://www.amazon.com.au/dp/B00CWR333A