How to show file extensions for known file types in Windows - futures io
futures io



How to show file extensions for known file types in Windows


Discussion in Tech Support

Updated
    1. trending_up 2,818 views
    2. thumb_up 9 thanks given
    3. group 1 followers
    1. forum 3 posts
    2. attach_file 5 attachments




Welcome to futures io: the largest futures trading community on the planet, with well over 125,000 members
  • Genuine reviews from real traders, not fake reviews from stealth vendors
  • Quality education from leading professional traders
  • We are a friendly, helpful, and positive community
  • We do not tolerate rude behavior, trolling, or vendors advertising in posts
  • We are here to help, just let us know what you need
You'll need to register in order to view the content of the threads and start contributing to our community.  It's free and simple.

-- Big Mike, Site Administrator

(If you already have an account, login at the top of the page)

 
Search this Thread
 

How to show file extensions for known file types in Windows

(login for full post details)
  #1 (permalink)
 xplorer 
Site Moderator
London UK
 
Experience: Beginner
Platform: CQG
Broker: S5
Trading: Futures
 
xplorer's Avatar
 
Posts: 5,486 since Sep 2015
Thanks: 13,911 given, 13,628 received

When attempting to extract multi-part downloads I've seen a few users being tripped up by the Windows option that hides file extensions for known file types.

Typically they would follow instructions, only to be met with extraction error messages.

What is this option?
For certain file types, Windows can show filenames in two different formats.

For example, if I have a text file called "Futures", the file can be shown in Windows either like so:






or like so:







Why the difference?
It all depends on a certain setting that either shows or hides the file extension, i.e. what comes after the filename in files that Windows recognizes.


Here is an example of a user attempting to extract files with the file extensions hidden. In the first picture you can already tell that file extensions are hidden, as the archive file

CL 10-19.7z is only shown as CL 10-19



This is generally not a problem when having to extract single archive files. When, however, one needs to extract archives that span across multiple files, having the Windows option to keep the file extensions hidden is a problem.

Why is this a problem with multi-part files?
FIO's security checks prevent that unknown (and potentially unsafe) file types are uploaded onto the website. Because of these stringent security checks, multi-part downloads need to be renamed prior to upload so that they are recognized by FIO. When downloading them, they need to be renamed again to their original filename.


Windows users that keep the file extension hidden, download the multi-part archive files and rename them will typically see something like this when attempting extraction:



This implies that the user attempted to rename a multi-part archive file adding at the end ".001", ".002" and so on, not realizing that the real file extension is hidden, in which case the operation produces unexpected results.

How can I show extensions for file types when they are hidden then?
Just go to Windows Explorer into Tools -> Folder options (your Windows version may slightly differ), click on the "View" tab, and uncheck this box





For more information about showing/hiding file extensions in Windows check this article out:

https://www.thewindowsclub.com/show-file-extensions-in-windows

Started this thread Reply With Quote
The following 6 users say Thank You to xplorer for this post:

Can you help answer these questions
from other members on futures io?
Looking for combined bar type (UniRenko with HeikinAshi) NT8
NinjaTrader
Displaying Individual order entry bars for multiple Brac …
NinjaTrader
Server Sepcs
TradeStation
Can anyone help convert this pine script to EasyLanguage?
EasyLanguage Programming
PSA: Stay Away from TradeStation
Brokers
 
 
(login for full post details)
  #2 (permalink)
 ilikeread 
San Mateo, CA, USA
 
Experience: Intermediate
Platform: NinjaTrader
Trading: ES
 
Posts: 44 since Aug 2010
Thanks: 196 given, 26 received

Hi,
This post exactly solved my problem of not able to unzip3 parts ES files that you posted in the forum. Thank you so much!

Now I got a new question. All of the downloaded Market Replay data will be saved in my C:/Document/Ninjatrader 8/db/replay folder. If I plan to download 10 years of ES data to do some backtesting, this will quickly fill up my C drive. I currently use a small SSD C drive. Is it okay that I save the data in some other drive and still do the backtesting? Will it affect the testing speed?

Thanks a lot!

Reply With Quote
 
(login for full post details)
  #3 (permalink)
 xplorer 
Site Moderator
London UK
 
Experience: Beginner
Platform: CQG
Broker: S5
Trading: Futures
 
xplorer's Avatar
 
Posts: 5,486 since Sep 2015
Thanks: 13,911 given, 13,628 received



ilikeread View Post
Hi,
This post exactly solved my problem of not able to unzip3 parts ES files that you posted in the forum. Thank you so much!

Now I got a new question. All of the downloaded Market Replay data will be saved in my C:/Document/Ninjatrader 8/db/replay folder. If I plan to download 10 years of ES data to do some backtesting, this will quickly fill up my C drive. I currently use a small SSD C drive. Is it okay that I save the data in some other drive and still do the backtesting? Will it affect the testing speed?

Thanks a lot!

As far as I know you can't. NinjaTrader sees the Replay data only in its folder. You can't tell NinjaTrader to go look in a folder other than where it expects to find the files.

What you could do is backtest in segments, i.e. 1-2 years at a time. This would translate into having to move data in and out of the C drive so that it does not fill up too much.

It's a pain, I know, but if you have limited free space I don't see another option.

Started this thread Reply With Quote
The following 2 users say Thank You to xplorer for this post:
 
(login for full post details)
  #4 (permalink)
 ilikeread 
San Mateo, CA, USA
 
Experience: Intermediate
Platform: NinjaTrader
Trading: ES
 
Posts: 44 since Aug 2010
Thanks: 196 given, 26 received

Thank you very much for your answer!

Reply With Quote
The following user says Thank You to ilikeread for this post:


futures io Trading Community Off-Topic Tech Support > How to show file extensions for known file types in Windows


Last Updated on October 31, 2019


Upcoming Webinars and Events
 

NinjaTrader Indicator Challenge!

Ongoing
     



Copyright © 2021 by futures io, s.a., Av Ricardo J. Alfaro, Century Tower, Panama, Ph: +507 833-9432 (Panama and Intl), +1 888-312-3001 (USA and Canada), info@futures.io
All information is for educational use only and is not investment advice.
There is a substantial risk of loss in trading commodity futures, stocks, options and foreign exchange products. Past performance is not indicative of future results.
no new posts