# ISAVEBAK System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) → [I](Help%20System/GSTARCAD/2027/System%20Variables/I/(I).md) ## Function Description: The ISAVEBAK system variable is used to increase the speed of incremental saves, especially for large drawings. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | The ISAVEBAK system variable is used to control creation of bak files. ## System Variable Value: **0:** do not create BAK files (the same as fully save) **1:** create BAK files **Note:** in some situations(such as power failure when saving), some drawing date may missing. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables_Igsv/ISAVEBAK.html) · © Gstarsoft Co., Ltd.