What is USB doing?

I'm still running on 1809 because I can't get the 1903 upgrade to work. I'm
about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and port are
both USB 3], instead of just showing up, I get a moving green bar in the
This PC header. I can't open the drive until the scan completes, but after
that everything works fine. Until I go to eject the Thumb drive. The same
scan kicks in again, and it won't eject until the scan finishes.

As an example I told the system to eject the thumb drive a minute or two
before I started this entry. It is still processing. And if I go to the
'Eject USB' applet in the task bar, the USB device doesn't show up until
the scan finishes.

?????

lonelydad wrote in
.28:

I'm still running on 1809 because I can't get the 1903 upgrade to
work. I'm about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and port
are both USB 3], instead of just showing up, I get a moving green bar
in the This PC header. I can't open the drive until the scan
completes, but after that everything works fine. Until I go to eject
the Thumb drive. The same scan kicks in again, and it won't eject
until the scan finishes.

As an example I told the system to eject the thumb drive a minute or
two before I started this entry. It is still processing. And if I go
to the 'Eject USB' applet in the task bar, the USB device doesn't show
up until the scan finishes.

?????


I have to add that Disk Management won't show any drives until after the
green bar stops.

lonelydad wrote:
lonelydad wrote in
.28:

I'm still running on 1809 because I can't get the 1903 upgrade to
work. I'm about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and port
are both USB 3], instead of just showing up, I get a moving green bar
in the This PC header. I can't open the drive until the scan
completes, but after that everything works fine. Until I go to eject
the Thumb drive. The same scan kicks in again, and it won't eject
until the scan finishes.

As an example I told the system to eject the thumb drive a minute or
two before I started this entry. It is still processing. And if I go
to the 'Eject USB' applet in the task bar, the USB device doesn't show
up until the scan finishes.

?????


I have to add that Disk Management won't show any drives until after the
green bar stops.

You should run Task Manager and "Details" tab
and see if MsMpEng is running and using cycles,
which is Windows Defender.

I get the green bar quite a lot, when I access my
Downloads folder.

I can think of a few possibilities:

1) Thumbnails for image folders.
2) Windows Defender scan.
3) "TakeOwn" activity, so a user can access
an item prepared on a "foreign" computer.

4) (weak) maybe CHKDSK like activity.
Dirty bit set and Windows unable to clear it.
That happened more on older Windows versions.

You could temporarily, as an experiment, format
the stick FAT32 and retest. The stick will then have
a max file size of 4GB, but you might be spared some
amount of annoyance. To work around the file size
limit issue, you can use 7ZIP to "archive and segment"
a larger file. For example, moving a 20GB VHD file
with the USB stick, I could use 7ZIP in "store" mode
and it would make five 4GB files of it for me. And
this would fit within the confines of FAT32.

Another possibility, is you're logged into a "limited account"
or something. Maybe the symptoms change, as a function
of limited account usage (no "administrator group" privileges).
I don't normally run that way, but I can report that
people who do, have all sorts of weird reports when I
try to help them :-) "My machine won't let me do that."
It's the account.

Paul

lonelydad wrote:

I'm still running on 1809 because I can't get the 1903 upgrade to work. I'm
about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and port are
both USB 3], instead of just showing up, I get a moving green bar in the
This PC header. I can't open the drive until the scan completes, but after
that everything works fine. Until I go to eject the Thumb drive. The same
scan kicks in again, and it won't eject until the scan finishes.

As an example I told the system to eject the thumb drive a minute or two
before I started this entry. It is still processing. And if I go to the
'Eject USB' applet in the task bar, the USB device doesn't show up until
the scan finishes.

?????

How many files are in the folder selected? What types of files? If you
have thumbnailing enabled, having to read all those files to create
thumbnail images takes a long time for the scanning. Thumbnail caching
helps but it often gets discarded or corrupted and has to get rebuilt.

See what happens when you configure File Explorer to NOT use thumbnail
views and just use file icons (a fixed set of icons that represent a few
filetypes). Thumbnails are expensive, especially when you've using
naming to identify content rather than you have to visually scan through
tons of thumbnails trying to find something similar to what you want to
see.

Of course, instead of having folders with a huge number (thousands) of
images files within them, you could use subfolders to organize those
images into [sub]categories. The green bar doesn't take as long to
build thumbnails when there are less image files to scan.

Also right-click on the folder, select Properties from the context menu,
and check if there is a Customize tab panel. If so, check if "Optimize
this folder for" is set to Pictures. Change to General or Documents for
the folder type. Apply to subfolders if there are any.

VanguardLH wrote in :

lonelydad wrote:

I'm still running on 1809 because I can't get the 1903 upgrade to
work. I'm about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and
port are both USB 3], instead of just showing up, I get a moving
green bar in the This PC header. I can't open the drive until the
scan completes, but after that everything works fine. Until I go to
eject the Thumb drive. The same scan kicks in again, and it won't
eject until the scan finishes.

As an example I told the system to eject the thumb drive a minute or
two before I started this entry. It is still processing. And if I go
to the 'Eject USB' applet in the task bar, the USB device doesn't
show up until the scan finishes.

?????

How many files are in the folder selected? What types of files? If
you have thumbnailing enabled, having to read all those files to
create thumbnail images takes a long time for the scanning. Thumbnail
caching helps but it often gets discarded or corrupted and has to get
rebuilt.

See what happens when you configure File Explorer to NOT use thumbnail
views and just use file icons (a fixed set of icons that represent a
few filetypes). Thumbnails are expensive, especially when you've
using naming to identify content rather than you have to visually scan
through tons of thumbnails trying to find something similar to what
you want to see.

Of course, instead of having folders with a huge number (thousands) of
images files within them, you could use subfolders to organize those
images into [sub]categories. The green bar doesn't take as long to
build thumbnails when there are less image files to scan.

Also right-click on the folder, select Properties from the context
menu, and check if there is a Customize tab panel. If so, check if
"Optimize this folder for" is set to Pictures. Change to General or
Documents for the folder type. Apply to subfolders if there are any.

This happens long before we get this far. I'm talking about the initial
Windows Explorer screen, where it shows each drive and its size and
amount in use.

lonelydad wrote:

VanguardLH wrote in :

lonelydad wrote:

I'm still running on 1809 because I can't get the 1903 upgrade to
work. I'm about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and
port are both USB 3], instead of just showing up, I get a moving
green bar in the This PC header. I can't open the drive until the
scan completes, but after that everything works fine. Until I go to
eject the Thumb drive. The same scan kicks in again, and it won't
eject until the scan finishes.

As an example I told the system to eject the thumb drive a minute or
two before I started this entry. It is still processing. And if I go
to the 'Eject USB' applet in the task bar, the USB device doesn't
show up until the scan finishes.

?????

How many files are in the folder selected? What types of files? If
you have thumbnailing enabled, having to read all those files to
create thumbnail images takes a long time for the scanning. Thumbnail
caching helps but it often gets discarded or corrupted and has to get
rebuilt.

See what happens when you configure File Explorer to NOT use thumbnail
views and just use file icons (a fixed set of icons that represent a
few filetypes). Thumbnails are expensive, especially when you've
using naming to identify content rather than you have to visually scan
through tons of thumbnails trying to find something similar to what
you want to see.

Of course, instead of having folders with a huge number (thousands) of
images files within them, you could use subfolders to organize those
images into [sub]categories. The green bar doesn't take as long to
build thumbnails when there are less image files to scan.

Also right-click on the folder, select Properties from the context
menu, and check if there is a Customize tab panel. If so, check if
"Optimize this folder for" is set to Pictures. Change to General or
Documents for the folder type. Apply to subfolders if there are any.

This happens long before we get this far. I'm talking about the initial
Windows Explorer screen, where it shows each drive and its size and
amount in use.

I've not had the slow green bar when opening File Explorer where it
shows only the drive objects. Remember that there is still a Folders
panel in File Explorer showing the recently used or common folders.
Doesn't matter if it is collapsed or expanded. Mine currently lists: 3D
Objects, Desktop, Documents, Downloads, Music, Pictures, and Videos.
Those are folder objects, not drive objects. I don't keep much in those
folders, and what pics I have in the Pictures folder are organized into
subfolders rather than all mashed together in the same folder.

I also have OneDrive and Google Drive synchronizing on those folders,
and those might slow updating in File Explorer. You might try rebooting
into safe mode to see if File Explorer is still slow under a cleaner
environment.

On 9/3/19 4:16 PM, lonelydad wrote:
I'm still running on 1809 because I can't get the 1903 upgrade to work. I'm
about to go with a clean install. But that's not the issue.

All of a sudden, when I put a USB Thumb drive in my PC [Drive and port are
both USB 3], instead of just showing up, I get a moving green bar in the
This PC header. I can't open the drive until the scan completes, but after
that everything works fine. Until I go to eject the Thumb drive. The same
scan kicks in again, and it won't eject until the scan finishes.

As an example I told the system to eject the thumb drive a minute or two
before I started this entry. It is still processing. And if I go to the
'Eject USB' applet in the task bar, the USB device doesn't show up until
the scan finishes.

?????

Hi Pops,

This probably won't help, but it won't stop
me from commenting anyway.

Okay, I get into this a little late, but I get
something similar (I forget exactly) when I
insert my read only thumb drives into customer's
machines. It is usually their Anti Virus doing
an automatic scan of my drive.

I have also seen Dot Net's installer seize if I have a
read only thumb drive inserted. Automatic updates often
install Dot Net updates whilst I am working as a
typical fix action is to fix the automatic updates.

Oh and since my drive is read only, I have no qualms
just grabbing and jerking. Chuckle.

-T

On 9/6/19 5:22 PM, T wrote:
ItÂ*isÂ*usuallyÂ*theirÂ*AntiÂ*VirusÂ*doing
anÂ*automaticÂ*scanÂ*ofÂ*myÂ*drive.

And lets not forget a photo editing program
scanning for photos. That annoys the snot
out of me.