It is not possible to easily access their archived Instagram posts from a computer. However, you can use BlueStacks and go through the mobile application from your PC or your Mac. Learn how to view your archived Instagram posts from a computer, thanks to BlueStacks.
Steps
Part 1 of 3: Install BlueStacks

Step 1. Go to BlueStacks.com
Use the browser of your choice. The most popular include Firefox and Chrome.
BlueStacks is an Android emulator, which will allow you to use your applications from your computer, as if you were on your Android device

Step 2. Click the Download BlueStacks 5 button
The browser will automatically detect whether you are using a Mac or a PC and adapt the download accordingly. A popup window will appear allowing you to choose the location of the download.

Step 3. Select Save
The installer will save the location chosen in the previous step, which will likely be the Downloads folder.

Step 4. Click on the file and follow the steps on the screen
Choose Yes to authorize changes, if prompted. Read and accept the terms before accepting them and continuing with the installation process.

Step 5. Click Install Now
A progress bar will allow you to follow the download.
After downloading the application, a progress bar will allow you to follow the installation
Part 2 of 3: Download Instagram

Step 1. Open BlueStacks
You'll find it in your Start menu or in your Applications folder.
- The first time you launch BlueStacks, the process will be relatively slow.
- The app will ask you to sign in to a Google account or create a new one.
- You will see the list of installed applications that you can use with BlueStacks.

Step 2. Click in the search bar
You will find it in the upper right corner of the window. The list of most searched apps will drop down.

Step 3. Type Instagram and press Enter Where Return.
This will open a new tab called App center, in your search results window.

Step 4. Select Instagram by Instagram
You will see a Google Play Store window open, displaying information about the Instagram app.
If you haven't signed in to a Google Account or created one, you'll be asked again. You will need a Google account to download an Android app

Step 5. Press the Install button
Part 3 of 3: Access archived publications

Step 1. Click the Open button
The Instagram app will open in BlueStacks. The app window might shrink to the size of a phone screen.

Step 2. Choose Connection Where Create a new account.
You can identify yourself with your Facebook account or with your Instagram email and password.

Step 3. Click on your profile picture or on the silhouette

You will find it at the bottom right of the screen. Your profile page will appear.

Step 4. Press ☰
This button will be in the upper right corner of the screen.

Step 5. Select Archives
This will usually be the first link in the menu, next to a small arrow going backwards. You will see the list of your archived stories appear.

Step 6. Click on the Archive stories box
You will see a drop-down menu appear.

Step 7. Choose Publications Archive
You will see the list of your archived publications appear.

Step 8. Tap a post to open it
- The photo and all of its original comments will be displayed on the screen.
- To unarchive a publication, click on the three small dots at the top right of the screen and select Show on profile. The post will return to its original place in your feed.