The local backup feature of GBWhatsApp supports the automatic generation of encrypted backup files (with the extension.crypt14) every day. The default storage path is internal storage /GBWhatsApp/Backups. Each backup file contains up to 7 days of message history (adjustable to 30 days). According to the survey data of 100,000 users in 2024, the average backup file size for each user is 2.3GB (15% for text messages and 85% for media files). The ZSTD compression algorithm is adopted, reducing the file size by 22% compared to the official WhatsApp.
Cloud backup is integrated through Google Drive and supports the selection of backup frequency (daily/weekly/monthly) and network conditions (Wi-Fi only/any network). Tests show that in a 100Mbps broadband environment, uploading a 1GB backup file takes an average of 4 minutes and 30 seconds, consuming approximately 1.05GB of data (including encrypted metadata). After the Google Drive API upgrade in 2023, the backup success rate of third-party applications increased from 88% to 97%.
The encryption system adopts the 256-bit AES-GCM algorithm, and the key is derived through PBKDF2 (with 20,000 iterations), and the cracking success rate is less than 0.0001%. Users can set custom passwords (8 to 32 characters in length), and the system will mandate a combination of upper and lower case letters, numbers, and special symbols. Tests conducted by the Brazilian Cybersecurity Laboratory in 2024 revealed that this encryption strength can withstand 99.98% of brute-force attacks.
Incremental backup technology only synchronizes new content, reducing the weekly backup time by 65%. The intelligent media management function can selectively exclude backed-up files (by type/size/time), with a maximum support for excluding video files larger than 500MB. Enterprise user reports show that this feature reduces the monthly backup storage cost by 42%.
The recovery function supports cross-device migration, with a success rate of up to 93% (subject to maintaining the same version number). When a new device is detected, the system will automatically download the latest backup (with an average rate of 12MB/ s) and maintain end-to-end encryption. In the 2024 data recovery test, 4,890 out of 5,000 simulated recovery operations were successfully completed. The main reason for failure was the change of Android system permissions.
In terms of risk control, it is recommended that users enable two-factor authentication (2FA) and regularly export plaintext backups in.txt format (with a maximum support of 200,000 messages). Research shows that users who adopt the 3-2-1 backup strategy (3 copies, 2 media, and 1 offline storage) have a 99% lower probability of data loss than those with a single backup. It is worth noting that the backup function of gbwhatsapp needs to be updated to the latest version to avoid compatibility issues.