File privileges problem on USB thumbdrive

[Robert Heller]

At Mon, 17 Aug 2020 06:15:27 +0800 "Ubuntu user technical support,  not for general discussions" <ubuntu-users at lists.ubuntu.com> wrote:

> 
> On 17/08/2020, Colin Law <clanlaw at gmail.com> wrote:
> > On Sun, 16 Aug 2020 at 20:10, Bret Busby <bret.busby at gmail.com> wrote:
> >>
> >> Hello.
> >>
> >> This applies equally to UbuntuMATE 20.04.x and 16.04.x .
> >>
> >> I have a USB thumbdrive, which is formatted as FAT32.
> >>
> >> I want to move the files written to it, to another medium, so as to
> >> reuse the thumbdrive for writing.
> >>
> >> I have previously done this, with this thumbdrive, and, with other
> >> thumbdrives of the same model, capacity (128GB), and manufacturer.
> >>
> >> However, now, whilst file managers (caja and PCmanFM) show me, as the
> >> owner of the files, with Read and write folder access, no file access
> >> privilege is shown in the caja file manager, and, I can not use cut
> >> (and thence paste to another destination) or rename functionality on
> >> the files, and, trying to use chmod 777 and sudo chmod 777 , both
> >> return the error "file system is read only".
> >>
> >> ls  -l shows
> >> -rw -r--r--
> >> for the files.
> >>
> >> As I am supposed to be able, as the shown owner of the files, both
> >> read and write to, the files, why does the operating system designate
> >> them as read-only, and, how do I overcome this?
> >
> > Apologies in advance, but I have to ask whether you have checked that
> > the write protect switch on the drive (if there is one) is in the
> > correct state?
> >
> > Otherwise are you able to write to it on a Windows system?  It is
> > possible that it is broken.
> >
> > It might be worth watching the log while you plug it in, it might
> > indicate why it is read only.
> > sudo journalctl -f
> > or
> > sudo tail -f /var/log/syslog
> >
> > Colin
> >
> > --
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> > ubuntu-users at lists.ubuntu.com
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> >
> 
> I have tried repeatedly to send responses from the 20.04 computer in
> which the thumbdrive is located, and every message (four so far)
> disappeared when I clicked the send button. gmail tells me that each
> message is sent, but, each disappears without a trace, even with using
> a BCC back to me. gmail is eating my email.

All four messages went out on the list.

It is a *feature* of GMail (not a bug) that when you send a message to a 
mailing list GMail hides/discards the copy that comes back to you.  It is a 
feature not a bug.  You could complain to Google, but good luck with that.

> 

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