Inawt
Level 1
(1 points)
Q: 25 GB .bt3 file in library that backups with Time Machine daily
Dear all,
Recently I discovered that around once a day Time Machine wants to backup around 25GB. It took me some time to figure out why this is the case since I did not do much with my Mac between two large backups. Using a tmutil compare command in Terminal I discovered that there is a file in my library of around 25GB which was changed since the last backup. Because of this change Time Machine wants to backup the file again and again.
The file is called genp.bt3 and can be found in the following location.
/Users/username/Library/Application Support/com.apple.sbd/A3004ECB-8AC4-4FBD-B88A-DE6673DCBD43/KeychainV0-tomb/genp .bt3
Can anyone help me with what this file is and why it is so big and changes so often? It takes up one fifth of my total hard drive space, so I will be glad if I can get rid of it.
Yours sincerely,
Inawt
MacBook Air, OS X El Capitan (10.11.1), null
Linc Davis
Level 10
(208,037 points)
Please take these steps to resynchronize the iCloud keychain. Your keychain on iCloud and your other Apple devices won't be affected. Take Step 2 only if Step 1 doesn't solve the problem.
Step 1
Back up all data.
Open the iCloud preference pane and uncheck the Keychain box. You'll be prompted to delete the local iCloud keychain. Confirm—the data will remain on the servers. Then re-check the box. Follow one of the procedures described in this support article to set up iCloud Keychain on an additional device. Test.
Step 2
If you still have problems, uncheck the Keychain box again and continue.
Triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:
~/Library/Keychains
In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You may not see what you pasted because a line break is included. Press return.
A folder named "Keychains" should open. Inside it is a subfolder with a long name similar to (but not the same as) this:
421DE5CA-D745-3AC1-91B0-CE5FC0ABA128
The above is only an example; yours will have a different name of the same general form. Drag the subfolder (not the Keychains folder) to the Trash and empty.
Restart the computer and re-enable iCloud Keychain.
