Recycle Bin can be accessed from the Home tab by clicking on the link in the sidebar, as shown in the following screenshot:

Recycle Bin is where the deleted data is stored and from where it can be accessed for 15 days, after which the data becomes hard deleted and is no longer recoverable.

Clicking on Recycle Bin allows you to view both your deleted items plus your organization's deleted items, as shown in the following screenshot:

You can use the Empty your recycle bin button to permanently remove deleted items prior to the 15-day expiration.

To calculate the number of records that your recycle bin can store, Salesforce uses this formula: 25 multiplied by the number of Megabytes (MB) in your storage.

For example, if your organization has 1 GB, which equates to 1000 MB (a 1000 MB storage unit is used here and not 1028 MB), then your limit is 25 multiplied by 1000 MB, which equals 25,000 records.

When your organization reaches the Recycle Bin limit, the Salesforce CRM application automatically removes the oldest records (if they have been in the Recycle Bin for at least two hours).