Upgrading from v2 to v3 in BigCommerce can be a complicated process, which many store owners prefer not to handle themselves. This is because all items that have options, modifiers, and rules are affected by the migration process, requiring the removal of v2 attributes and replacing them with the v3 version. Not only is this time-consuming, but it can also be overwhelming.

Fortunately, Your Store Wizards has extensive experience in managing and migrating BigCommerce data and has developed a 10-step process to simplify the v2 to v3 migration for store owners.

Our v2 to v3 Migration Service is Recommended by BigCommerce in this support article - https://support.bigcommerce.com/s/article/Products...

Our 10-Step v2 to v3 Process:

1. Store owner provides us with store access and API Tokens.

2. We review your current data and look for any anomalies or issues, or things that may be unsupported.

3. After all issues have been reviewed and resolved, we will work with you to set a day and time for the migration.

4. A few hours before the scheduled product change cut-off time we will download all products from your store into our database and staging site. We will then run some final tests to make sure we're prepared and ready to begin!

5. When it's time to close off the store to visitors, we will post a message about the store being down for maintenance with an expected re-open time, which is based on our estimates as to how long the entire process will take.

6. Once closed we will begin removing all options, modifiers, and rules from your existing items. Don't worry, we leave the items in place so no product IDs change! At this time, if you have inventory in BigCommerce set at a variant level, we back that information up.

7. After all options, modifiers, and rules are removed, we will begin the process to upgrade to the v3 product experience.

8. Once complete, we then inject options and modifiers to your products. Existing rules will be converted, as needed, to modify the appropriate variants. Your options will be split to options or modifiers depending on if they create variants. For example, text boxes will convert to a modifier where drop downs and swatch options stay as options.

9. Once all options, modifiers, and rules have been injected, we run a validation check to see if there are any issues or errors that need to be resolved, then make adjustments where needed.

10. Your store is made live and you're upgraded to the v3 product experience!